Suppose you want to estimate the average age of all pokemon players. Would you use a confidence interval or a hypothesis test?.

A) True. Therefore, there should be no systematic bias when probability sampling is done correctly.

When conducting a research study, it is important to ensure that the sample chosen is representative of the population. Probability sampling is a method that aims to achieve this by giving each member of the population an equal chance of being included in the sample.

When this sampling method is done correctly, it minimizes bias and ensures that the sample is truly representative. For example, let's consider a study on the average height of students in a particular school.

If we were to use probability sampling, we would assign a number to each student and then randomly select a certain number of students from that pool. This would give every student an equal chance of being chosen for the sample, eliminating any systematic bias that might arise if we were to select students based on subjective criteria.

To know more about Bias visit.

https://brainly.com/question/32957440

#SPJ11

Answer: 11

Step-by-step explanation: Calculators answer

No, we cannot measure 3 gallons of water using 2 jugs of size 100 and 98 gallons. But, we can measure 4 gallons of water using these jugs.

Let's call the two jugs A and B, with A being the 100-gallon jug and B being the 98-gallon jug.

To measure 3 gallons of water, we need to have one jug that is smaller than 3 gallons and another jug that is larger than 3 gallons.

However, both of these jugs are larger than 3 gallons.

This means that it is impossible to measure 3 gallons of water using these jugs.

To measure 4 gallons of water, we can follow these steps:

Fill jug A to the top with water.

Pour the water from jug A into jug B until jug B is full.

This will leave 2 gallons of water in jug A.

Pour the water from jug B down the drain, then pour the 2 gallons from jug A into jug B.

Fill jug A to the top with water.

Pour the water from jug A into jug B until jug B is full.

This will leave 96 gallons of water in jug B, with 4 gallons of water in jug A.

Thus, we can measure 4 gallons of water using these jugs.

For such more questions on gallons

https://brainly.com/question/28274339

#SPJ8

Answer:

35 books

Step-by-step explanation:

40*3=120

120-85=35

Answer: 22( w + 2 ) =77 and the amount of the water bottle would be 1.50

Step-by-step explanation: i dont know what to write??

According to the Question, The interest earned in 4 years is $1,954.83.

What is compounded quarterly?

A quarterly compounded rate indicates that the principal amount is compounded four times over one year. According to the compounding process, if the compounding time is longer than a year, the investors would receive larger future values for their investment.

The principal is $10,000.

The annual interest rate is 4.5%, which is compounded quarterly.

Since there are four quarters in a year, the quarterly interest rate can be calculated by dividing the annual interest rate by four.

The formula for calculating the future value of a deposit with quarterly compounding is:

\(P = (1 + \frac{r}{n})^{nt}\)

Where P is the principal

The annual interest rate is the number of times the interest is compounded in a year (4 in this case)

t is the number of years

The interest earned equals the future value less the principle.

Therefore, the interest earned can be calculated as follows: I = FV - P

where I = the interest earned and FV is the future value.

Substituting the given values,

\(P = $10,000r = 4.5/4 = 1.125n = 4t = 4 years\)

The future value is:

\(FV = $10,000(1 + 1.125/100)^{4 *4} = $11,954.83\)

Therefore, the interest earned is:

\(I = $11,954.83 - $10,000= $1,954.83\)

Thus, the interest earned in 4 years is $1,954.83.

Learn more about Compounded Quarterly:

https://brainly.com/question/24924853

#SPJ11

1. The outcomes in the sample space of choosing a letter from the word STARK are: S, T, A, R, K.

2. Number of outcomes in the sample space = 6 (from THANKS) × 5 (from STARK) = 30.

3. The Probability of choosing the letters AA is 0, as there are no occurrences of the letter A in both words together.

1. The outcomes in the sample space of choosing a letter from the word THANKS are: T, H, A, N, K, S.

  The outcomes in the sample space of choosing a letter from the word STARK are: S, T, A, R, K.

2. To find the number of outcomes in the sample space, we multiply the number of outcomes for each word.

  Number of outcomes in the sample space = Number of outcomes for the first word × Number of outcomes for the second word

  Number of outcomes in the sample space = 6 (from THANKS) × 5 (from STARK) = 30.

3. The probability of choosing the letters AA would be the number of favorable outcomes (which is 0 in this case) divided by the total number of outcomes in the sample space.

  Probability of choosing AA = Number of favorable outcomes / Total number of outcomes

  Probability of choosing AA = 0 / 30 = 0.

Therefore, the probability of choosing the letters AA is 0, as there are no occurrences of the letter A in both words together.

To know more about Probability .

https://brainly.com/question/13604758

#SPJ11

Answer:

x = 60°, y = 100°, z = 120°, w = 80°

Step-by-step explanation:

x and 120° are adjacent angles on a straight line and sum to 180°

x + 120° = 180° ( subtract 120° from both sides )

x = 60°

Similarly

y + 80° = 180° ( subtract 80° from both sides )

y = 100°

and

z + 60° = 180° ( subtract 60° from both sides )

z = 120°

--------------------------------------------------------------------

The sum of the interior angles in a quadrilateral = 360°

sum the interior angles of the quadrilateral and equate to 360°

60° + 80° + 120° + 4th angle = 360°

260° + 4th angle = 360° ( subtract 260° from both sides )

4th angle = 100°

w and 100° are adjacent angles on a straight line and sum to 180° , so

w + 100° = 180° ( subtract 100° from both sides )

w = 80°

The nurse should set the IV pump to deliver 125 mL/hr in order to administer the D5W 750 mL IV over 6 hr.

The nurse should set the IV pump to deliver 125 mL/hr in order to administer the D5W 750 mL IV over 6 hr. To calculate the infusion rate, you can use the formula:

Infusion rate (mL/hr) = Volume to be infused (mL) / Infusion time (hr)

In this case, the volume to be infused is 750 mL and the infusion time is 6 hr. Plugging these values into the formula, we get:

Infusion rate (mL/hr) = 750 mL / 6 hr = 125 mL/hr

Therefore, the nurse should set the IV pump to deliver 125 mL/hr in order to administer the D5W 750 mL IV over 6 hr.

Learn more about IV pump at https://brainly.com/question/29257638

#SPJ11

Answer:

Step-by-step explanation:

Here you go mate

Step 1

-7x+8<-6  Equation/Question

Step 2

-7x+8<-6  Simplify

-7x+8<-6

Step 3

-7x+8<-6  Subtract 8

-7x<-14

Step 4

-7x<-14  Divide sides by -7

answer

x>2

Hope this helps

Answer:

I have no clue j need more free answer

Step-by-step explanation:

3x+2y+z=16 4x-y=-5 y+x=11

Answer:

\(\left \{ {{6x+4y=76} \atop {x+y=16}} \right.\)

Step-by-step explanation:

1) if (according to the condition) the amount of quilting is 'x' and the amount of sateen is 'y', then the price of the quilting fabric is 6*x and the price of then sateen fabric is 4*y;

2) the 76$ she spends can be written as 6x+4y=76;

3) total of 16 yards can be written as x+y=16;

4) finally, the required system is:

\(\left \{ {{6x+4y=76} \atop {x+y=16}} \right.\)

A system of equations is a collection of two or more equations with a same set of unknowns. 4x+6y=76, x+y=16 are required system of equations.

A system of equations is a collection of two or more equations with a same set of unknowns.

According to the condition the amount of quilting is 'x' and the amount of sateen is 'y', then the price of the quilting fabric is 4x and the price of then sateen fabric is 6y;

the 76$ she spends can be written as 4x+6y=76;

Total of 16 yards can be written as x+y=16;

So the required system of Equations is:

4x+6y=76

x+y=16

Hence Option C is correct. 4x+6y=76, x+y=16.

To learn more on System of Equations click:

https://brainly.com/question/24065247

#SPJ2

By using the concept of proportionality, it can be concluded that-

Constant of proportionality is \(\frac{5}{9}\)

What is proportion?

Suppose there are two quantities. Proportionality indicates that if there is a change in the value of one quantity, the value of other quantity also changes but maintaining a constant ratio

Proportionality can be direct or inverse

Two quantities are said to be in direct proportion if on increasing the value of one quantity, the value of other quantity also increases and vice versa.

For example cost of a commodity and quantity of a commodity are in direct proportion

Two quantities are said to be in inverse proportion if on increasing the value of one quantity, the value of other quantity decreases and vice versa.

For example Number of men and number of days taken by those men to complete a job.

In the equation

\(y=\dfrac{5}{9}x\),

y is proportional to x with the constant of proportionality \(\frac{5}{9}\)

To learn more about proportion, refer to the link:

https://brainly.com/question/24868934

#SPJ1

The correct choice is that  the absolute maximum value is 25.

To find the absolute maximum and minimum values of the function f(x,y) = \(x^2 + y^2\)- 2y + 1 on the set R = {(x, y) |\(x^2 + y^2 ≤ 16\)}, we need to look for critical points and boundary points.

First, we find the critical points by setting the partial derivatives of f(x,y) with respect to x and y equal to zero:

∂f/∂x = 2x = 0

∂f/∂y = 2y - 2 = 0

Solving these equations simultaneously gives us the critical point (0,1).

Now, we look at the boundary of the set R, which is the circle centered at the origin with radius 4. We can parameterize this circle using polar coordinates:

x = 4cosθ

y = 4sinθ

Substituting these values into f(x,y), we get:

f(θ) =\(16cos^2θ\) + \(16sin^2θ\) - 8sinθ + 1

= 17 - 8sinθ

To find the maximum and minimum values of f(θ), we can take its derivative:

df/dθ = -8cosθ

Setting df/dθ = 0 gives us cosθ = 0, which has solutions θ = π/2 and θ = 3π/2. Therefore, the maximum value of f(θ) occurs at θ = π/2 or θ = 3π/2, and is:

f(π/2) = 17 + 8 = 25

Similarly, the minimum value of f(θ) occurs at θ = π/2 + π = 3π/2, and is:

f(3π/2) = 17 - 8 = 9

Comparing these values to the value of f at the critical point, f(0,1) = \(0^2\)+ \(1^2 - 2(1)\)+ 1 = 0, we see that the absolute maximum value of f(x,y) on the set R is 25, and the absolute minimum value is 0.

For more such questions on absolute value

https://brainly.com/question/5012769

#SPJ4

Answer:

Q9:D

Q10:B

Step-by-step explanation:

Q9:for two graphs to be perpendicular, the product of their gradients has to be -1

multiplying the gradients of the equation in the question and the equation in option "D", we get -1 hence D is correct

There are 2 possible values for N.

To find the number of possible values for N, we must first find the common fraction representing people who value both color and smell. To do this, we need to find the LCM (Least Common Multiple) of the denominators 14 and 12. The LCM of 14 and 12 is 84.

Let x be the number of people who value both color and smell. Then, (9/14)N + (7/12)N - x = 753, which simplifies to (27/84)N + (14/84)N - x = 753. Combining the fractions gives (41/84)N - x = 753.

Now, we know that x is an integer, and (41/84)N must be an integer as well. Therefore, N must be a multiple of 84. Since 41 is a prime number, the only multiples of 84 that can satisfy this condition are 84 and 168, making 2 possible values for N.

To know more about Least Common Multiple click on below link:

https://brainly.com/question/26487478#

#SPJ11

Answer:

30 J

Step-by-step explanation:

Given : -

Height ( h ) = 3m

Weight ( W ) = 10 N

To find : GPE = ?

Note : -

GPE is Gravitational Potential Energy.

It is expressed in Joules ( J ).

Formula : -

W = mg

mg = 10 N

Formula : -

GPE = mgh

GPE = 10 x 3

GPE = 30 J

Therefore,

A bird weighs 10 N and is standing 3 m, it's

GPE is 30 J.

Answer:

The answer is GPE = 300 Nm (Newton meters)

Step-by-step explanation:

The bird's mass weighs to 10 Newtons.

Presuming this took place on Earth, the gravitational force is 10 Newtons.

The bird is standing 3 meters above the ground.

Using the GPE formula (GPE = mgw,) the answer should be 300 Newton metres.

The 95% confidence interval to estimate the population proportion of items which are defective is of:

(0.0239, 0.1409).

A confidence interval of proportions has the bounds given by the rule presented as follows:

\(\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}\)

In which the variables used to calculated these bounds are listed as follows:

The confidence level is of 95%, hence the critical value z is the value of Z that has a p-value of \(\frac{1+0.95}{2} = 0.975\), so the critical value is z = 1.96.

The sample size and the estimate of the population proportion are given as follows:

\(n = 85, \pi = \frac{7}{85} = 0.0824\)

Then the lower bound of the interval is of:

\(\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.0824 - 1.96\sqrt{\frac{0.0824(0.9176)}{85}} = 0.0239\)

The upper bound of the interval is of:

\(\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.0824 + 1.96\sqrt{\frac{0.0824(0.9176)}{85}} = 0.1409\)

More can be learned about the z-distribution at https://brainly.com/question/25890103

#SPJ1

Answer:

(x+5)/(2x+3)

Step-by-step explanation:

So we know the top part is difference of two squares. So thats (x+5)(x-5)

The bottom part

Firstly you do 2 times -15= -30

Now we need to find two numbers with a difference of 7 but multiply to give 30.

30

1 x 30

2 x 15

3 x 10

5 x 6

From here we can see 3-10=-7 and multiply to make -30

So we do 2x²-10x+3x-15

simplify this in two different parts: 2x²-10x and 3x-15

2x(x-5) and 3(x-5)

Therefore we get (2x+3)(x-5)

(x+5)(x-5)/(2x+3)(x-5)

x-5 is common so they cancel each other out leaving you with

(x+5)/(2x+3)

I hoped this helped :)

Beta decay is a type of radioactive decay that occurs in certain atomic nuclei. It involves the transformation of a neutron or proton within the nucleus into the other.

In the case of Lanthanum-144 (La-144), a neutron undergoes beta decay to convert into a proton, resulting in the formation of Cerium-144 (Ce-144).

The equation for the beta decay of La-144 into Ce-144 is as follows:

La-144 → Ce-144 + β¯

In this equation, the La-144 nucleus decays into the Ce-144 nucleus. To conserve charge, a beta particle (β¯) is emitted. The beta particle can be either an electron (β-) or a positron (β+), depending on the specific type of beta decay occurring in the nuclide.

Learn more about Beta decay here : brainly.com/question/21370162

#SPJ11

To spray on 2 lawns is required \(3\frac{1}{9}\)  gallons.

Mixed fraction A fraction represented with its quotient and remainder is a mixed fraction. For example, 2 1/3 is a mixed fraction, where 2 is the quotient, 1 is the remainder. So, a mixed fraction is a combination of a whole number and a proper fraction.

Given ;

  A container with \(3\frac{1}{2}\) gallons of weed killer can spray =  \(2\frac{1}{4}\) lawans

∵ in \(\frac{9}{4}\) lawn the week killer can spray =  \(\frac{7}{2}\)gallons

∴ in 1 lawn the weed killer is  used = \(\frac{7}{2}\) × \(\frac{4}{9}\) gallon

∴ in 2 lawns the weed killer can spray =\(\frac{7}{2}\)  ×  \(\frac{4}{9}\)× 2 =\(\frac{28}{9}\)  gallon =\(3\frac{1}{9}\)gallons

  \(3\frac{1}{9}\) gallons require to spray 2 lawns.

 learn more about Mixed fraction: brainly.com/question/1301963

 #SPJ4

Answer:

(c+n)(c-n)=0 I think I'm not so sure

Answer:

Ray is 21 years old

Ali is 19 years old

and Nora is 24 years old

The expected return for investing in buildings in the metro area cannot be determined with the given information.

To calculate the expected return, we would need to know the probabilities associated with different scenarios. These probabilities could include factors such as occupancy rates, rental market trends, and economic conditions. Without this information, it is not possible to calculate the expected return accurately.

Furthermore, the expected cost of a building with rents and expenses of $5 million each, or the expected net profit per year for a $50 million building, cannot be determined without additional data on rental market conditions, operating expenses, and other relevant factors. These values would depend on various factors such as location, demand, competition, and market dynamics. Therefore, without more information, it is not possible to provide an accurate estimate for these figures.

Learn more about probabilities here: brainly.com/question/31828911

#SPJ11

Allowing users to dive deeper into the view of data with Online Analytical Processing (OLAP) is essential for comprehensive data analysis and decision-making.

Online Analytical Processing (OLAP) is a powerful technology that enables users to interactively analyze and explore data from various perspectives. It plays a crucial role in allowing users to dive deeper into the view of data by providing advanced analytical capabilities.

OLAP systems facilitate multidimensional data analysis, which allows users to navigate through different dimensions, hierarchies, and levels of detail. They can drill down, slice, dice, and pivot data to examine it from various angles, uncovering patterns, trends, and correlations that may not be apparent in traditional data representations.

OLAP also supports aggregation functions, allowing users to summarize data and perform calculations across multiple dimensions.

By allowing users to dive deeper into the view of data, OLAP empowers them to make informed decisions. They can perform ad-hoc analysis, conduct what-if scenarios, and interactively explore data to answer specific business questions.

OLAP's interactive nature enables users to iteratively refine their analysis, adjusting parameters, filters, and dimensions in real-time.

In addition, OLAP systems provide interactive visualization capabilities, presenting data through charts, graphs, and dashboards. This visual representation enhances data understanding and facilitates the identification of trends and outliers.

Overall, allowing users to dive deeper into the view of data with OLAP enhances their analytical capabilities, promotes data exploration, and enables them to make data-driven decisions. It is an important part of comprehensive data analysis and facilitates a deeper understanding of complex datasets.

Learn more about Online Analytical Processing (OLAP) here:

https://brainly.com/question/30175494

#SPJ11

Answer:

False.

Step-by-step explanation:

False. In a reflection, either the x coordinate or the y coordinates of the shape have to be multiplied by -1.

This is a rotation.

Answer:

Ratio is 1:3

Step-by-step explanation:

Given that a jewellery shop sells 240 necklaces in a month. 180 were sold via the shops website, the rest were sold in a high street shop.

We have to work out the ratio for online sales to shop sales

Total sales .. 240

Shop sale .. 180

Online sa .. 60

Hence ratio for online sales:shop sales

Answer:

3:1 would be the most simplified answer

Step-by-step explanation:

I found out what the question was

The value of b = -3/2 and c = -5/4

To write the quadratic x² - 3x + 1 in the form (x + b)² + c, we can expand (x + b)² and compare it to the given expression:

(x + b)² = x² + 2bx + b²

Comparing this to the given expression x² - 3x + 1, we see that we need:

2bx = -3x, so b = -3/2

b² + c = 1, so substituting b = -3/2 gives:

(9/4) + c = 1

so c = 1 - 9/4

= 4/4 - 9/4

= -5/4

The quadratic x² - 3x + 1 can be written in the form (x - 3/2)² + ( - 5/4).

Therefore, the value of b = -3/2 and c = -5/4

Learn more about Quadratic Equation here

https://brainly.com/question/30098550

#SPJ4

Given question is incomplete, the complete question is below

the quadratic x²-3x + 1 can be written in the form (x +b)² + c, where b and c are constants. what is b, c?