Answer:
3/4
Step-by-step explanation:
Can someone help me order the units from least to greatest
Answer:milli,cent, meter , kilo
Step-by-step explanation:
suppose you are interested in investigating factors that affect the prevalence of tuberculosis among intravenous drug users. in a group of 97 individuals who admit to sharing needles, 24.7% had positive tuberculin skin test results; among 161 drug users who deny sharing needles, 17.4% had positive test results [246]. assuming that the population proportions of positive skin test results are in fact equal, estimate their common value p. test the null hypothesis that the proportions of intravenous drug users who have positive tuberculin skin test results are identical for those who share needles and those who do not. what is the probability distribution of the test statistic? what is the p-value? what do you conclude? construct a 95% confidence interval for the true difference in proportions.
a. The probability distribution of the test statistic is approximately a standard normal distribution.
b. The p-value for the test of factors that affect the prevalence of tuberculosis among intravenous drug users is 0.0202.
c. We can conclude that there is a statistically significant difference between the two groups in terms of their proportions of positive skin test results.
d. The 95% confidence interval does not contain zero, so there is a statistically significant difference between the two groups in terms of their proportions of positive skin test results.
To estimate the common value of p assuming that the population proportions of positive skin test results are equal, we can compute the pooled proportion:
p-hat = (x1 + x2) / (n1 + n2)
= (24.7 + 17.4) / (97 + 161)
= 0.195
where x1 and x2 are the number of individuals with positive skin test results in the two groups, and n1 and n2 are the sample sizes.
a. To test the null hypothesis that the proportions of intravenous drug users who have positive tuberculin skin test results are identical for those who share needles and those who do not, we can use a two-sample z-test for proportions. The test statistic is:
z = (p1 - p2) / sqrt(phat * (1 - phat) * (1/n1 + 1/n2))
where p1 and p2 are the sample proportions, phat is the pooled proportion, and n1 and n2 are the sample sizes.
Plugging in the values, we get:
z = (0.247 - 0.174) / sqrt(0.195 * (1 - 0.195) * (1/97 + 1/161))
= 2.05
The probability distribution of the test statistic is approximately a standard normal distribution, since the sample sizes are large enough (both n1 and n2 are greater than 30).
b. The p-value for the test is the probability of observing a z-value of 2.05 or more extreme under the null hypothesis. From a standard normal distribution table or calculator, we find that the p-value is approximately 0.0202 (or 0.0404 for a two-tailed test).
Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that the proportions of intravenous drug users who have positive tuberculin skin test results are not identical for those who share needles and those who do not.
c. To construct a 95% confidence interval for the true difference in proportions, we can use the formula:
(p1 - p2) ± z* sqrt(phat * (1 - phat) * (1/n1 + 1/n2))
where z is the critical value for a 95% confidence interval from a standard normal distribution (z = 1.96).
Plugging in the values, we get:
(0.247 - 0.174) ± 1.96 * sqrt(0.195 * (1 - 0.195) * (1/97 + 1/161))
= 0.073 ± 0.090
Therefore, we can be 95% confident that the true difference in proportions of intravenous drug users who have positive tuberculin skin test results between those who share needles and those who do not is between 0.073 and -0.073 (which can be written as an absolute value of 0.073).
d. We can infer that there is a statistically significant difference between the two groups in terms of the proportions of positive skin test results because the interval does not contain zero.
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in which quadrant is the point (-2,3) located
Answer:
It is in the seocnd quadrant
Step-by-step explanation:
Because if you look on a graph you'll see that if you go to -2 on the x axis and then 3 on the y axis and count the quadrants it's in the second one.
Answer:
It lies on the 2nd quadrant.
Step-by-step explanation:
because in 1st quad elements having (+,+)are kept
2nd quad elements have(-,+)
3rd quad elements have (-,-)
4th quad elements have (+,-)
write the given expression as an algebraic expression: tan(cos−1( 3/x)) for x > 3.
The algebraic expression for tan(cos⁻¹(3/x)) is (√(x² - 9))/3, where x > 3.
First, we need to evaluate cos⁻¹(3/x). The inverse cosine function returns the angle whose cosine is equal to 3/x. Let's call this angle θ. Therefore, cos(θ) = 3/x.
Next, we need to evaluate tan(θ). We know that tan(θ) = sin(θ)/cos(θ). To find sin(θ), we can use the Pythagorean identity: sin²(θ) + cos²(θ) = 1.
sin²(θ) + cos²(θ) = 1
sin²(θ) + (3/x)² = 1
sin²(θ) = 1 - (9/x²)
sin(θ) = ±√(1 - (9/x²))
Since x > 3, 1 - (9/x^2) is positive, so we take the positive square root. Therefore, sin(θ) = √(1 - (9/x²)).
Now we can substitute sin(θ) and cos(θ) into the expression tan(cos⁻¹(3/x)):
tan(cos⁻¹(3/x)) = tan(θ)
tan(θ) = sin(θ)/cos(θ)
tan(θ) = (√(1 - (9/x²)))/(3/x)
Finally, we simplify the expression by multiplying the numerator and denominator by x/3:
tan(cos−1(3/x)) = (√(x² - 9))/3
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71.700 rounded to the nearest hundredth
Answer:
71.70
Step-by-step explanation:
Answer:
71.70 for sure
help please ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Answer:
A , 10 unit square
B , 13 unit square
C , 9 unit square
D , 25 unit square
Step-by-step explanation:
I HOPE IT HELPS:))) !!!!
A supermarket gives a special
offer to cus-
tomers who purchase at least a pack of
vests and a pack of T-shirts. The offer is
restricted to a total of 7 of these items.
a) Write down three inequalities which
must be satisfied.
(b) Draw the graphs of the above condi-
tions and shade the region that satis-
fies them.
(c) If the supermarket makes a gain of N5
on each vest and N8 on each T-shirt,
find the maximum gain made by the
supermarket.
A) the three inequalities that must be satisfied are:
The number of vests, represented by x, must be a non-negative integer: x ≥ 0.The number of T-shirts, represented by y, must also be a non-negative integer: y ≥ 0.The total number of vests and T-shirts must not exceed 7: x + y ≤ 7.B) Graph shaded and satisfying all conditions is attached.
What is an inequality?An inequality in mathematics is a relationship that makes a non-equal comparison between two integers or other mathematical expressions.
It is most commonly used to compare the sizes of two numbers on a number line.
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ariana has $1.40 worth of nickels and dimes. she had twice as many nickels as dimes. determine the number of nickels and the number of dimes that ariana has
Answer:
Ariana has 7 dimes and 14 nickels
Step-by-step explanation:
Nickel = 0.05
Dime = 0.10
1.40 ÷ 2 = 0.70
7 x 2 = 14
because Adriana has twice the nickels as dimes and half of the 1.40 is dimes so the other half is nickels.
nickels x 2 = 14
The difference of two number is 169 the smaller number is 191 what is the other number
circular cloud of poison gas from a factory explosion is expanding so that hours after the explosion the radius of the cloud is meters. how fast is the area of the cloud increasing hours after the explosion?
The rate at which the area of the cloud is increasing is equal to the product of the rate of expansion and the square of the radius of the cloud.
Therefore, the rate at which the area of the cloud is increasing is equal to the product of the rate of expansion and the radius of the cloud. The rate of expansion can be calculated using the equation . Therefore, the rate at which the area of the cloud is increasing can be calculated as .
The area of a circle is determined by the square of its radius. Thus, when the radius of the cloud is expanding at a rate, the area of the cloud is increasing at a rate that is proportional to the square of its radius.
Therefore, in order to calculate the rate at which the area of the cloud is increasing, we must calculate the rate of expansion of the radius of the cloud and then multiply it by the square of the radius of the cloud. To calculate the rate of expansion of the radius of the cloud, we can use the equation .
After we have calculated the rate of expansion, we can then multiply it by the square of the radius of the cloud to calculate the rate at which the area of the cloud is increasing.
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Help plz giving out brianlest
The Phillips curve describes the relationship between... a. The output gap and potential GDP. O b. The money supply and interest rates. C. The unemployment rate and the rate of change of wages. O d. A
The Phillips curve describes the relationship between the unemployment rate and the rate of change of wages. Option C is the correct option.
What is Phillips curve?
The relationship between the rate of inflation and the unemployment rate is represented by the Phillips curve. The analysis of wage inflation and unemployment in the United Kingdom from 1861 to 1957 by A. W. H. Phillips, despite having forerunners, is a significant development in the field of macroeconomics. When unemployment was high, wages rose slowly; when unemployment was low, wages rose quickly, according to Phillips' research.
According to Phillips' hypothesis, as the unemployment rate declines, the labor market becomes more competitive and firms are forced to raise wages more quickly in order to recruit qualified workers. The pressure decreased as unemployment rates rose. The average relationship between wage behavior and unemployment over the course of the business cycle was represented by Phillips' "curve."
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which of the following statements is true of the sample size for nonprobability samples
The statement that is true of the sample size for nonprobability samples is that it is typically small.
Nonprobability sampling methods are often used when it is not feasible or practical to obtain a large sample that is representative of the population.
Nonprobability samples are selected based on criteria other than random selection, such as convenience, judgment, or purposive sampling. These methods are commonly used in qualitative research or when studying hard-to-reach populations.
Since nonprobability samples do not guarantee representativeness, the focus is often on in-depth exploration rather than generalization to a larger population. As a result, researchers often work with smaller sample sizes that are more manageable and allow for in-depth analysis of the selected cases or individuals.
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On seeing the report of Company A, we found that the "EVA rises 224% to Rs.71 Crore" whereas Company B's "EVA rises 50% to 548 crore".
a. Define EVA, and discuss its significance.
b. Comparatively analyze EVA in relation with measures like EPS or ROE? Is EVA suitable in Indian Context?
a. EVA (Economic Value Added) measures a company's economic profit by deducting the cost of capital from net operating profit after taxes.
b. EVA is a more comprehensive and suitable measure compared to EPS or ROE in evaluating a company's value creation.
a. EVA (Economic Value Added) is a financial metric that measures the economic profit generated by a company. It is calculated by subtracting the company's cost of capital from its net operating profit after taxes. EVA is significant because it provides a more accurate measure of a company's financial performance than traditional metrics like net profit or earnings per share. By deducting the cost of capital, EVA takes into account the opportunity cost of using capital and provides a clearer picture of whether a company is creating value for its shareholders.
b. EVA is a comprehensive measure that considers both the profitability and capital efficiency of a company, making it a more holistic indicator of performance compared to metrics like EPS (Earnings Per Share) or ROE (Return on Equity). While EPS focuses solely on the profitability of a company, and ROE measures the return generated on shareholders' equity, EVA takes into account the total capital employed and the cost of that capital. This makes EVA more suitable for evaluating the true economic value generated by a company.
In the Indian context, EVA can be a valuable metric for assessing corporate performance. It provides insights into how efficiently a company utilizes its capital and whether it is creating value for its shareholders. However, the adoption and use of EVA may vary among Indian companies, as it requires accurate and transparent financial data, as well as a thorough understanding of the concept and its calculation. Nevertheless, for companies that prioritize value creation and long-term sustainable growth, EVA can be a valuable tool for evaluating performance.
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3/16 x 6 in the simplest form
The fraction 9/8 is the simplest form of the given fraction.
What is the fraction?A fraction is defined as a numerical representation of a part of a whole that represents a rational number.
The fraction is given in the question, as follows:
3/16 x 6
We have to determine the evaluation of the given fraction
As per the question, we have
3/16 x 6
Apply the multiplication operation,
18/16
Reduce the above fraction into the simplest form, and we get
9/8
Thus, the fraction 9/8 is the simplest form of the given fraction.
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PLSSS HELP ASAP and don’t send links I really need help this is hard ash
Answer:
\(b = \sqrt{ \frac{ {c}^{2} }{2 {\pi}^{2} } - {a}^{2} } \)
One day, Amanda received 3 junk emails and every
day after that, the number increased by 5. She
deletes her junk emails every day. The limit for her
inbox is 5000 emails. How long will it take to go
over her limit?
Answer:
1000 days
Step-by-step explanation:
5000-3 =4997
4997÷5 = 999r2
999+1 =1000
Answer:
1000.4 days
Step-by-step explanation:
5000-3 = 4997
4997/5 = 999.4
999.4 + 1 = 1000.4 days
(can be rounded down)
7) What does a multiplier of \( 1.2 \) mean?
A multiplier of 1.2 means the value is multiplied or increased by a factor of 1.2.
A multiplier is a term used to represent a factor by which a value is multiplied or increased. It is a numeric value that indicates the extent of the increase or expansion of a given quantity. Multiplication by a multiplier results in scaling or changing the magnitude of the original value.
A multiplier of 1.2 indicates that a value will be increased by 20% or multiplied by a factor of 1.2. This means that when the multiplier is applied to the original value, the resulting value will be 1.2 times the original.
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the population of the city Martin was approximately 12,420 in the year 2005 and has been continuously growing at a rate of 1.6% each year
The function that describes the population of Martin is\(P(t) = 12,420 \times (1 + 0.016)^t\)
The predicted population of Martin in 2015 is 14557
The predicted population of Martin in 2002 is 10,658
The function that describes the population of Martin as a function of the number of years t, since 2005, can be written as:
\(P(t) = 12,420 \times (1 + 0.016)^t\)
where P(t) is the population of Martin t years since 2005.
To predict the population of Martin in 2015, we need to substitute t = 10 into the equation:
P(10) = 12,420 × (1 + 0.016)¹⁰
= 14556.5
Therefore, the predicted population of Martin in 2015 is approximately 14556.5 people.
To predict the population of Martin in 2002, we need to find the number of years between 2005 and 2002, which is 3 years.
We can substitute t = -3 into the equation:
P(-3) = 12,420 × (1 + 0.016)⁻³)
= 10,658
Therefore, the predicted population of Martin in 2002 is approximately 10,658 people.
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A square has a diagonal that measures 18 inches. To the nearest tenth, what is the length of one side
of the square?
Answer:
18/sqrt(2)
Step-by-step explanation:
Divide the square into two congruent right triangles:
a and b are the sides of the triangle
since we know that a=b
then the right triangle is isosceles
meaning that the theorem of the 45-45-90 triangle is applicable
so then we can say that 18/sqrt(2) = a = b
Solve for x round all answers to the nearest tenth
Answer:
x = 18.3°
Step-by-step explanation:
X is an angle u can solve it by usind sin(x)
sin(x) = 11/35
X = sin^-1 (11/35)
x = 18.3°
when a single arithemetic / logic unit (alu), which does the math in a processor, is given 2 independent register sets so that it can quickly alternate between running 2 separate threads, we call it
When a single arithemetic / logic unit (alu), which does the math in a processor, is given 2 independent register sets so that it can quickly alternate between running 2 separate threads, we call it simultaneous multithreading.
Simultaneous multithreading, or "SMT," is the term used when a single Arithmetic/Logic Unit (ALU) is given two independent register sets to swiftly switch between operating two distinct threads.
SMT is a technique used in processor design to improve overall performance by allowing multiple threads to be executed concurrently on a single physical processor core. It enables the ALU to switch between different threads, or sets of instructions, rapidly, providing the illusion of simultaneous execution and effectively utilizing the available resources.
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Charlotte is driving at 52.7 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.99 s. How far has Charlotte traveled in feet during this time
Answer:
385.7 ft
Step-by-step explanation:
The relation between speed, distance, and time is ...
distance = speed × time
Compatible unitsThe speed is given in miles per hour, but the time is given in seconds and the distance is wanted in feet. This suggests a conversion of speed to feet per second is appropriate.
\(\dfrac{52.7\text{ mi}}{\text{h}}\times\dfrac{1\text{ h}}{3600\text{ s}}\times\dfrac{5280\text{ ft}}{1\text{ mi}}=\dfrac{52.7\cdot22\text{ ft}}{15\text{ s}}=77.29\overline{3}\text{ ft/s}\)
DistanceThe distance traveled is the product of this speed and the time period.
\(\dfrac{77.29\overline{3}\text{ ft}}{1\text{ s}}\times4.99\text{ s}=385.6937\overline{3}\text{ ft}\approx\boxed{385.7\text{ ft}}\)
help answer correctly !!!!!!!!!!!! Will mark 50 points !!!!!!!!!!!!!!!
Answer:
Bro the question is of 5 points not 50
The blue segment below is a diameter of oo. What is the length of the radius
of the circle?
A. 4.1 units
B. 16.4 units
C. 8.2 units
D. 12.3 units
Radius is half of the diameter:
8.2 / 2 = 4.1
The answer is A. 4.1 units.
The blue segment below is a diameter of 8.2 units. so, the length of the radius of the circle would be 4.1 units.
What is the diameter?Diameter is defined as the line from one point in the circle to the other point through the center of the circle.
Diameter = radius / 2
The radius is half of the diameter
The blue segment below is a diameter of oo. we need to find the length of the radius of the circle.
The diameter of the circle is given as 8.2 units.
We know that the radius is half of the diameter
= 8.2 / 2
= 4.1
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To secure A grade one must obtain an average of 90 marks or more in 5 subjects each of
maximum 100 marks. If one scored 84, 87, 95, 91 in first four subjects, what is the minimum
mark one scored in the fifth subject to get A grade in the course?
Answer:
More than 93 marks in fifth subject.
Step-by-step explanation:
To secure A grade one must obtain an average of 90 marks or more in 5 subjects each of maximum 100 marks.
If one scored 84, 87, 95, 91 in first four subjects.
We need to find the minimum marks scored in the fifth subject to get A grade in the course. Let the marks be x.
\(\dfrac{84+87+95+91+x}{5}>90\\\\\dfrac{357+x}{5}>90\\\\357+x>450\\\\x>450-357\\\\x>93\)
So, the score in the fifth subject to get A grade should be more than 93,
A company has made a rubber ball for $0.02 per square foot. the company wants to spend a maximum of $1 each on a new ball. what is the diameter of the new ball to the nearest tenth of a foot?
The diameter of a new ball is 4.0ft
According to the statement
we have given that the the company wants to spend a maximum of $1 each.
And we have to find a diameter of a new ball.
Remember that for a sphere of diameter D, the surface area is
A = 4*pi*(D/2)^2
In this case, the cost is $0.02 per square foot, and the company wants to expend (at maximum) $1 per ball, so first we need to solve:
$0.02*A = $1
A = $1/$0.02 = 50
So the surface of the ball must be 50 square feet.
Then we solve:
50ft^2 = 4*3.14*(D/2)^2
D = 2*√(50 ft^2/(4*3.14)) = 4.0 ft
here the diameter of a ball is 4.0ft.
So, The diameter of a new ball is 4.0ft
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Fred spent $41.50 at a garden show. He bought a large pot for $29 and some plants for $2.50 each. how many plants did fred buy
the total money spent by fred is 41.50 $
the cost of the pot is 29 $
and he buys plants of the remaining money
so, remaining money is, 41.50 - 29 = 12.50$
it is given that the cost of a plant is 2.50$
so, in 12.50$ the number of plant he bought is,
12.50/2.50 = 5 plants
thus, he bought 5 plants.
I don't understand this question can someone help me with this please, please explain!! and thank you for the help!! If u dont know try your best :D
Answer:
3*4 is 12, 12*4 is 48, 48*4 is 192, so the answer is 192
If m=6, then 3×6= 18.
43-18=25
Your answer is 25.
Step-by-step explanation:
Can I have brainly please!
EVALUATE EXPRESSION
Step-by-step explanation:
43-3m=?? if m=6
substitute
43-3 * 6= 25
7z/4+5x if z=8 and x=3 PLEASE HELP THIS IS DUE IN 20 MINS.
Answer:
29
Step-by-step explanation:
7(8)/4+5(3)
56/4+15
14+15
29