drug company is developing a new pregnancy-test kit for use on an outpatient basis. The company uses the pregnancy test on 100 women who are known to be pregnant for whom 95 test results are positive. The company uses test on 100 other women who are known to not be pregnant, of whom 99 test negative. What is the sensitivity of the test? What is the specificity of the test? Part 2: the company anticipates that of the women who will use the pregnancy-test kit, 10% will actually be pregnant. c) What is the PV+ (predictive value positive) of the test?

Answers

Answer 1

The sensitivity of the pregnancy test is 95% and the specificity is 99%. Given an anticipated 10% pregnancy rate among women using the test, the positive predictive value (PV+) of the test can be determined.

What is the positive predictive value (PV+) of the pregnancy test?

The sensitivity of a test refers to its ability to correctly identify positive cases, while the specificity measures its ability to correctly identify negative cases. In this case, out of the 100 known pregnant women, the test correctly identified 95 as positive, resulting in a sensitivity of 95%. Similarly, out of the 100 known non-pregnant women, the test correctly identified 99 as negative, giving it a specificity of 99%.

To determine the positive predictive value (PV+) of the test, we need to consider the anticipated pregnancy rate among women who will use the test. If 10% of the women who use the test are expected to be pregnant, we can calculate the PV+ using the following formula:

PV+ = (Sensitivity × Prevalence) / (Sensitivity × Prevalence + (1 - Specificity) × (1 - Prevalence))

Substituting the given values, we get:

PV+ = (0.95 × 0.1) / (0.95 × 0.1 + 0.01 × 0.9)

PV+ = 0.095 / (0.095 + 0.009)

PV+ = 0.91

Therefore, the positive predictive value (PV+) of the pregnancy test is approximately 91%.

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Related Questions

Solve for arc x
Thxs and hurry

Solve for arc x Thxs and hurry

Answers

The value of arc x is solved to be 120 degrees

How to find the value of arc x

The Arc x is solved using the knowledge of linear pair

A linear pair of angles forms a straight line, and the two angles are said to be "linear" because they are next to each other and their measures add up to 180 degrees.

Applying this we have that

60 + x = 180

x = 180 - 60

x = 120 degrees

hence we can say that x is 120 degrees

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SHOW YOUR WORK please the end of quater is almost done


2(x - y) and 2x - 2y

Answers

Answer:

Changes made to your input should not affect the solution: (1): "d2"   was replaced by   "d^2". 
STEP 1:Equation at the end of step 1 ((((2•(x-y)•a)•n)•d2)•x)-2y

STEP 2:Equation at the end of step 2 (((2a • (x - y) • n) • d2) • x) - 2y

STEP 3:Equation at the end of step 3 ((2an • (x - y) • d2) • x) - 2y

STEP 4:Equation at the end of step 4 (2and2 • (x - y) • x) - 2y

STEP 5:Equation at the end of step 5 2xand2 • (x - y) - 2y

STEP 6:

STEP 7:Pulling out like terms  7.1     Pull out like factors :   2x2and2 - 2xyand2 - 2y  =   2 • (x2and2 - xyand2 - y) 

Trying to factor a multi variable polynomial : 7.2    Factoring    x2and2 - xyand2 - y Try to factor this multi-variable trinomial using trial and error  Factorization failsFinal result : 2 • (x2and2 - xyand2 - y)

Step-by-step explanation: mark me brainliest!!

your final results is in the attachement

SHOW YOUR WORK please the end of quater is almost done2(x - y) and 2x - 2y

writ all the factors other than 1 and the number itself


for 5th grade

Answers

Answer:

A prime number has exactly two factors, 1 and itself. For example, 13 is a prime number because the only factors of 13 are 1 and 13

if this is what you are looking for..

Angle measure: What is the m

Angle measure: What is the m

Answers

Answer:

m< JKL = 63°

m< MKL = 27°

Step-by-step explanation:

(12x+3) + (6x-3) =90°

18x = 90

x= 90/18

x=5

m< JKL (12x+3) = 12(5)+3=60+3=63

m< MKL (6x-3)=6(5)-3=30-3=27

I hope I helped you^_^

Hey can you help me with this please it’s hard

Hey can you help me with this please its hard

Answers

The events that correspond to each case are given as follows:

a) Exactly one odd number: OEE, EOE, EEO.

b) More odd numbers than even numbers: OOO, OOE, OEO, EOO.

c) Two or more odd numbers: OOO, OOE, OEO, EOO.

Hence the probabilities of each event are given as follows:

a) Exactly one odd number: 3/8.

b) More odd numbers than even numbers: 1/2.

c) Two or more odd numbers: 1/2.

How to calculate the probabilities?

A probability is calculated as the division of the number of desired outcomes by the number of total outcomes.

For this problem, we have three trials, each with two possible outcomes, hence the total number of outcomes is given as follows:

2³ = 8.

The meaning of the letters is given as follows:

O: odd number.E: even number.

Hence, for example, the event OEE means that an odd number was taken, then an even number and then another even number.

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There are 8 soccer teams for the 110 players in the league. The league wants the same number of players on each team. Which explains whether or not it is possible?

Answers

Answer:13 on each team but there wouldn’t be the Same amount

Step-by-step explanation:

Because you would divid 110 dived by 8 equals 13.75

If the measure of <1 is 40 degrees, the m<3 = ?
GIVING BRAINLEST FOR HELPING <3

If the measure of &lt;1 is 40 degrees, the m&lt;3 = ?GIVING BRAINLEST FOR HELPING &lt;3

Answers

Answer:

m < 3 = 40 degrees

Step-by-step explanation:

Measure of angle one and measure of angle three are the same because they are opposite angles (i cant remember the exact term)

Which of the following represents the value of the missing side? Round to the nearest tenth.

A. 2.0

B. 2.5

C. 2.9

D. 3.0

Which of the following represents the value of the missing side? Round to the nearest tenth.A. 2.0B.

Answers

C because it is to the nearest tenth I think

URGENT PLS!!

The equation of the line passing through the points (2,1) and (-6, -5) is given by ax+by=10. What is the value of a?​

Answers

Answer:

a=15

Step-by-step explanation:

URGENT PLS!!The equation of the line passing through the points (2,1) and (-6, -5) is given by ax+by=10.


The table shows the results of an experiment in which three coins were tossed.
What is the experimental probability that at least two of the coins will be heads? The theoretical probability?

Answers

The experimental probability that at least two heads would be gotten is 11 / 25.

The theoretical probability that at least two heads would be gotten is 1/2.

What are the probabilities?

Probability calculates the odds that a random event would happen. The probability the event occurs is 1 and the probability that the event does not occur is 0.

Experimental probability is based on the result of an experiment that has been carried out multiples times.

Experimental probability = number of times at least two heads would be gotten / total number of tosses

( 5 + 6 + 6 + 5)/50 = 22/50 = 11 / 25

Theoretical probability = number of times at least two heads would be gotten / total number of possible outcomes

4 / 8 = 1/2

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The table shows the results of an experiment in which three coins were tossed.What is the experimental

The two figures are similar. Find the missing
dimension. Round to the nearest tenth if
necessary.

The two figures are similar. Find the missingdimension. Round to the nearest tenth ifnecessary.

Answers

Answer:

4 in

Step-by-step explanation:

For the smaller figure, we can assume the other missing side is 2 because the area is 4, and area = length*width.

So the area of the larger figure is 4^2, or 16, so then we can assume the x or the two missing sides for the larger figure are 4 beacuse 4*4=16

On a postsynaptic membrane, the opening of which ion channel(s) induces an IPSP? Why? VRest -70 mV, threshold = -55 mV, Ec= -63 mV, Ex = -90 mV, and ENa = 60 mV. a) K+; It hyperpolarizes the neuron. O

Answers

On a postsynaptic membrane, the opening of K+ ion channel induces an IPSP (Inhibitory Postsynaptic Potential).

The potential changes in a neuron after the receptor and ion channel activation is called synaptic potential. This potential can be either an Excitatory Postsynaptic Potential (EPSP) or an Inhibitory Postsynaptic Potential (IPSP).EPSP is a depolarizing potential that results from the opening of the Na+ ion channel. It causes a change in the potential of the neuron towards threshold level that may trigger an action potential.Ion channels and pumps in a postsynaptic neuron regulate the internal potential of the cell. In a typical postsynaptic cell, the resting potential (Vrest) is -70 mV, the threshold value is -55 mV, the reversal potential for Cl- ion (Ec) is -63 mV, the reversal potential for K+ ion (Ex) is -90 mV, and the reversal potential for Na+ ion (ENa) is 60 mV.The opening of Cl- ion channel leads to an inward flow of negative ions and thus results in hyperpolarization. The opening of K+ ion channel leads to an outward flow of K+ ions, and the membrane potential becomes more negative. Thus, it also results in hyperpolarization. The opening of a Na+ ion channel leads to inward flow of Na+ ions, which makes the cell more positive, and it is depolarization. Therefore, the opening of K+ ion channel leads to an IPSP, and it hyperpolarizes the neuron.

The postsynaptic potential can be either an Excitatory Postsynaptic Potential (EPSP) or an Inhibitory Postsynaptic Potential (IPSP). The opening of the K+ ion channel leads to an outward flow of K+ ions, which makes the cell more negative and hyperpolarizes it, leading to IPSP.

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a 20-sided die has sides with the following symbols: two sides are blank three sides have green squares four sides have red triangles five sides have blue circles six sides have yellow crosses the die will be rolled 12 times. let x be the number times the die lands on a green square. x has a binomial distribution. what is a trial? [ select ] what would be considered a success? [ select ] how many trials? n

Answers

A trial in the context of a binomial distribution refers to a single experiment or attempt with a success or failure outcome.

A success in this problem is defined as the die landing on a green square, and the number of trials is 12.

A trial, in this context, refers to rolling the 20-sided die once.

When the die is rolled 12 times, each of those 12 rolls is considered a separate trial.
A success is the outcome that we are interested in tracking.

In this case, a success is when the die lands on a green square.
The number of trials, denoted by 'n', is the total number of times the die is rolled.

In your question, the die will be rolled 12 times, so n = 12.
To recap:
- A trial: Rolling the 20-sided die once
- A success: The die landing on a green square.
- Number of trials (n): 12.

Since x has a binomial distribution, this implies that each trial is independent, and the probability of success remains constant throughout all trials.

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What ordered pair is closest to a local minimum of the function, f(x)?


(–1, –3)

(0, –2)

(1, 4)

(2, 1)

What ordered pair is closest to a local minimum of the function, f(x)?(1, 3)(0, 2)(1, 4)(2, 1)

Answers

I believe the correct answer is (-1, -3)

Manders Manufacturing Corporation uses the following model to determine an optimal product mix for its two products, metal (M) and scrap metal (S):
Max Z = $30M + $70S
Where: 3M + 2S ≤ 15
2M + 4S ≤ 18
The above mathematical functions together constitute a(n):
a. Simulation model.
b. Linear programming model.
c. Economic order quantity model.
d. Multivariate regression model.
e. Nonlinear optimization model.

Answers

b. Linear programming model is the correct option.

How can Manders Manufacturing Corporation determine an optimal product mix for metal and scrap metal using a mathematical model?

A linear programming model is a mathematical technique used to find the best outcome in a given set of constraints. In this case, Manders Manufacturing Corporation is trying to determine the optimal product mix for its two products, metal (M) and scrap metal (S), based on certain constraints. The objective is to maximize the profit, represented by the function Z = $30M + $70S.

The constraints are represented by the inequalities:

3M + 2S ≤ 15

2M + 4S ≤ 18

These constraints define the limitations on the production of metal and scrap metal. The model aims to find values of M and S that satisfy these constraints while maximizing the objective function.

Using linear programming techniques, the corporation can solve this model to find the optimal values for M and S that will maximize their profit. This approach allows them to make data-driven decisions and allocate their resources efficiently. By formulating the problem as a linear programming model, Manders Manufacturing Corporation can make informed choices about the optimal product mix to achieve their business objectives.

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convert 7 and 1/3 into a improper fraction

Answers

Answer:

22/3.

Step-by-step explanation:

7 1/3

= (7*3 + 1)/3

= 22/3.

PLEASE HELP URGENTLY I WILL GIVE BRAINLIEST!!!!

PLEASE HELP URGENTLY I WILL GIVE BRAINLIEST!!!!

Answers

When is this due? I think I can help u with this

The average cost of regular gasoline per gallon in 2014 was $3.34. In 2015 it decreased $0.94 per gallon in 2016 it decreased another $0.27 per gallon. The average cost increased.36 per gallon in 2017 what was the average cost per gallon at the end of 2017

Answers

£5.00 is the answer I think so at least. I am not very good at maths but this is what I got

what method will you use to find the model, polynomial interpolation or least square method? why?

Answers

In order to determine whether to use polynomial interpolation or the least squares method, it is important to consider the characteristics of the data being analyzed. Polynomial interpolation is best suited for data that is uniformly spaced and has little to no noise. On the other hand, the least squares method is more appropriate for data that has noise and does not follow a clear pattern.

Polynomial interpolation is a method of finding a polynomial function that passes through a set of given points. It involves fitting a polynomial of degree n to n+1 data points, which can result in overfitting the data. This means that the polynomial may not accurately represent the overall trend of the data and may not generalize well to new data.

The least squares method, on the other hand, involves finding the line or curve that best fits the data by minimizing the sum of the squared residuals between the predicted values and the actual data. This method is more flexible and can fit a wide range of functions to the data, making it more suitable for noisy or irregularly spaced data.

In summary, the choice between polynomial interpolation and the least squares method depends on the characteristics of the data. If the data is uniformly spaced and has little noise, polynomial interpolation may be appropriate. However, if the data has noise or does not follow a clear pattern, the least squares method may be more suitable. Ultimately, it is important to choose the method that best captures the overall trend of the data while minimizing the effects of noise and overfitting.

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d) A square pyramid has a base with area of 40 cm2 and a volume of 100 cm
What is the height of the pyramid?

Answers

Answer:

2.5

Step-by-step explanation:

10² - (-10)² - (-10)²​

10 - (-10) - (-10)

Answers

The answer is -100 (10*10)- (-10*-10) - (10*10)

Answer:

-100 (10*10)- (-10*-10) - (10*10)

Step-by-step explanation:

if a person consumes 65 grams of protein and a total of 2700 kcalories per day, approximately what percentage of energy would be derived from protein?

Answers

Approximately 9.63% of the energy consumed by the person would be derived from protein.

How to calculate percentage of energy from protein?

To calculate the percentage of energy derived from protein, we need to first convert the amount of protein consumed from grams to calories. Protein provides approximately 4 calories per gram. Therefore, 65 grams of protein would provide:

65 grams * 4 calories/gram = 260 calories

This gives us 260 calories from protein.

To find the percentage of energy derived from protein, we can divide the calories from protein by the total calories consumed and multiply by 100:

260 calories / 2700 calories * 100% ≈ 9.63%

Therefore, approximately 9.63% of the energy consumed by the person would be derived from protein.

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what is the value of x when 2^x-7*5^x-4=1250​

Answers

Step-by-step explanation:

The correct answer is the photo

what is the value of x when 2^x-7*5^x-4=1250

The image below showcases a right triangle .

My questions:

What is a c, what does that represent

What is this problem asking for me

How do I solve this problem? Are there any formulas in place?

The image below showcases a right triangle .My questions:What is a c, what does that represent What is

Answers

The perimeter of triangle is 66.24 units.

What is triangle?

In Euclidean geometry, any 3 points, once non-collinear, verify a unique triangle and at the same time, a unique plane

Main body:

according to question :

c = 28

let the vertices be A,B,C

∠A= 30°

by using trigonometric ratios,

BC/ AB = sin30°

AB = C = 28

BC/28 = sin30°

BC = 28*sin30°

BC= 28*(1/2)

BC = 14

similarly

AB /CA = cos 30°

28/CA = √3/2

CA = 28*√3/2

CA = 14/√3

CA = 24.24

Hence , perimeter = AB +BC +CA = 28+14+24.24

                              =66.24 units

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help please hurry......


Juan has 20 books to sell. he sells the books for $15 each. The amount of money Juan makes from selling x books is represented by a function.
f(x)=15x
what is the practical range of the function?

all multiples of 15 between 0 and 300, inclusive

all multiples if 20 between 0 and 300, inclusive

all real numbers

all integers from 0 to 20, inclusive ​

Answers

All multiples of 15 between 0 and 300,inclusive

How?

\(\\ \sf\longmapsto f(x)=15x\)

\(\\ \sf\longmapsto f(0)=15(0)=0\)

\(\\ \sf\longmapsto f(20)=15(20)=300\)

Hence.

\(\\ \sf\longmapsto 0\leqslant R_f\leqslant 300\)

how many permutations of length n are there in which 1 and 2 are in the same cycle and no longer than n/2

Answers

The total number of permutations satisfying the given conditions is 1 + 1 + 2 = 4.

The question asks for the number of permutations of length n in which 1 and 2 are in the same cycle, and the length of the cycle is no longer than n/2.

To find the number of such permutations, we can use the concept of cycles in permutations. A cycle is a set of elements that are permuted among themselves.

In this case, we want 1 and 2 to be in the same cycle. Let's consider the following possibilities:
1) If 1 and 2 are in a cycle of length 1, it means they are fixed and cannot be permuted. There is only one such permutation.
2) If 1 and 2 are in a cycle of length 2, they can be permuted among themselves. There is only one such permutation.
3) If 1 and 2 are in a cycle of length 3, there are 2 possibilities: (1, 2, x) or (2, 1, x), where x represents the other elements in the cycle.
4) If 1 and 2 are in a cycle of length 4, there are 3 possibilities: (1, 2, x, y), (2, 1, x, y), or (x, y, 1, 2).
5) Similarly, for a cycle of length 5, there are 4 possibilities.

We can observe a pattern here. The number of possibilities for a cycle of length n is n-2. However, we need to consider the condition that the length of the cycle should be no longer than n/2.

So, the total number of permutations in which 1 and 2 are in the same cycle and the length of the cycle is no longer than n/2 can be found by summing up the number of possibilities for each cycle length.

For example, if n=6, the length of the cycle can be 1, 2, or 3. We have 1 possibility for a cycle of length 1, 1 possibility for a cycle of length 2, and 2 possibilities for a cycle of length 3.

Therefore, the total number of permutations satisfying the given conditions is 1 + 1 + 2 = 4.

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HELP ASAP

Write the area of ​​the colored figure in a letter phenomenon, and then simplify that phenomenon.

HELP ASAP Write the area of the colored figure in a letter phenomenon, and then simplify that phenomenon.

Answers

Answer: 16x + 16

(2x+4)² is the large square ; (2x)² is the small square

the area of ​​the colored figure in a letter phenomenon is

(2x + 4)² - (2x)² = 4x² + 16x + 16 - 4x² = 16x + 16

Step-by-step explanation:

Colton sold a total of 28 t-shirts and sweatshirts as part of a fundraiser for his football team. If t-shirts cost $12 each and sweatshirts cost $20 each and he raised a total of $424, how many †-shirts did he sell?

Answers

i need points

Step-by-step explanation:

What is 2x+56=86?

Get X by itself.

Answers

Answer:

x = 15

Step-by-step explanation:

What is 2x+56=86?Get X by itself.

Answer: the answer is 15

how many driving lessons do you need to do with a professioanl instructor before my parents could teach me

Answers

The number of driving lessons you need to take with a professional instructor before your parents can teach you varies depending on the regulations in your area. In some regions, a specific number of driving lessons is required by law before you can apply for your driver's license. As a result, you should check with your local Department of Motor Vehicles (DMV) or other regulatory agency to learn more about the specific requirements in your area.

In general, however, it is usually beneficial to take as many driving lessons as possible with a professional instructor. Professional driving instructors have been educated in how to teach driving skills safely and effectively. They have also assisted many other people in learning how to drive, and as a result, they have a wealth of knowledge and expertise to draw on.

The more driving lessons you take with a professional instructor, the more chances you'll have to learn and improve your driving abilities. You may be able to practice with your parents after only a few lessons, but it's generally a good idea to take as many as possible with an instructor before doing so. This will give you the best chance of success while you learn to drive safely and confidently.

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why Ethiopian Government don't allow dual citizenship a. Total assets of Charter Company equal $840,000 and its equity is $490,000. What is the amount of its liabilities? b. Total assets of Martin Marine equal $640,000 and its liabilities and equity amounts are equal to each other. What is the amount of its liabilities? What is the amount of its equity? Assets = Liabilities + Equitya. $840,000 = + $490,000b. $640,000 = + In LEED, preconsumer recycled content is worth ________ thevalue of postconsumer content. You are completing a math assessment. The number of questions you complete and the time it takes you to complete them have a proportionalrelationship, as shown in the table.Number of Questions 6 11Time (in minutes) 15 ?How much time does it take to complete 11 questions?O 27 minutes, 30 secondsO 20 minutesO 13 minutes, 30 secondsO 5 minutes In the table, Pattern A uses the rule "add 2" and Pattern B uses the rule "add 1." Pattern A 8 10 12 14 16 Pattern B 4 5 6 7 8 Which statement is true? Every term in Pattern B is 4 less than the corresponding term in Pattern A. Every term in Pattern B is 4 times the corresponding term in Pattern A. Every term in Pattern B is 1/2 the corresponding term in Pattern A. Every term in Pattern B is 5 times the corresponding term in Pattern A. Working together, Willie and Eduardo can pick forty bushels of apples in 5.32 hours. Had he done it alone it would have taken Eduardo 13 hours. Find how long it would take Willie to do it alone. A ________ committee remains in existence from one session of Congress to the next, and has the power to write legislation that covers a particular subject, in most cases paralleling a major department or agency of the executive branch. Who was chosen by the Consultation to command the regular army of Texas?Stephen F. AustinSam HoustonHenry SmithJames W. Robinson List all the integers that satisfy 2< x < 6 At a large company banquet for several thousand employees and their families, many of the attendees became ill the next day. The company doctor suspects that the illness may be related to the fish, one of the three options for the main course. Since all guests had to preorder their meal, the doctor was able to randomly select and contact 80 people that are the fish, 64 got sick. 60 people who didn't eat the fish were also randomly selected and contacted, 39 got sick. The doctor knows at least 1000 attendees ordered the fish. A)is this convincing evidence that the true proportion of all attendees who ate the fish and got sick is greater than those who didn't eat the fish and got sick?B)based on your conclusion in A which mistake (a type 1 or type 2 error) could you have made? Interpretate in context. one third of a number t is less than or equal to 5 Moussa has a collection of vintage action figures that is worth $390. If the collection appreciates at a rate of 3% per year, which equation represents the value of the collection after 3 years? physical properties of alkaline metals In what ways does the author react differently to Anne Franks diary when she reads it as an adult? Cite evidence from the text to support your answer 2x-3y=3find the slope and y intercept help it due in 4 mins please the systematic, meaningful arrangement of symbols, which provides the basis for communication, is called Identify a hypothetical problem related to lifespan development that you think would be interesting to study. (Remember, you are not performing any research.) What method would you use to research this problem, and why did you choose it? How is this method used to perform research? What are the benefits of this method for your pretend research? What are the problems or challenges with this method? What are the ethical concerns that come from this method? What can the researcher do to limit the ethical issues that can arise from research? What did studies on the effects of ancient calming techniques by psychologists and neuroscientists indicate? previously, ipv6 specified that interface identifiers followed which format, which specifies a unique 64-bit interface identifier for each interface?