Suppose that a sample is to be taken without replacement from a finite population of size Nif the sample size is the same as the population size

(a) How many possible samples are there?

(b) What are the possible sample means?

(c) What is the relationship between the only possible sample and the population

Short Answer

Expert verified

Part a. Only one possible sample is there.

Part b. There is only one possible sample mean which is equal to the population mean.

Part c. The only possible sample is the same as the population itself.

Step by step solution

01

Part (a) Step 1. Given Information

It is given that a sample is to be taken without replacement from a finite population of size N if the sample size is the same as the population size.

We have to find out how many possible samples are there.

02

Part (a) Step 2. Explanation

We have a population of size N. And we have to draw a sample of size N without replacement.

There will be only one possible sample since we are drawing the sample without replacement and the sample size is equal to the population size.

So there is only one possible sample and it is the population itself.

03

Part (b) Step 1. Given Information

It is given that a sample is to be taken without replacement from a finite population of size N if the sample size is the same as the population size.

We have to find the total possible sample means.

04

Part (b) Step 2. Explanation

As there is only one possible sample and it is the population itself.

So there will be only one possible sample mean and it would be equal to the population mean itself.

05

Part (c) Step 1. Given Information

It is given that a sample is to be taken without replacement from a finite population of size N if the sample size is the same as the population size.

We have to find the relationship between the only possible sample and the population.

06

Part (c) Step 2. Explanation

As there is only one possible sample and it is the population itself.

So the relation between the only possible sample and the population is that they are the same.

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Most popular questions from this chapter

7.35 Refer to Exercise 7.5 on page 295 .

a. Use your answers from Exercise 7.5(b) to determine the mean, μi. of the variable x¯ for each of the possible sample sizes.

b. For each of the possible sample sizes, determine the mean, μ5, of the variable x¯, using only your answer from Exercise 7.5(a).

Officer Salaries. The following table gives the monthly salaries (in \(1000) of the six officers of a company.

a. Calculate the population mean monthly salary,μ

There are 15possible samples of size 4from the population of six officers. They are listed in the first column of the following table.

b. Complete the second and third columns of the table.

c. Complete the dot plot for the sampling distribution of the sample mean for samples of size 4Locate the population means on the graph.

d. Obtain the probability that the mean salary of a random sample of four officers will be within 1 (i.e., \)1000) of the population mean.

7.51 Earthquakes. According to The Earth: Structure, Composition and Evolution (The Open University, S237), for earthquakes with a magnitude of 7.5or greater on the Richter scale, the time between successive earthquakes has a mean of 437days and a standard deviation of 399days. Suppose that you observe a sample of four times between successive earthquakes that have a magnitude of 7.5 or greater on the Richter scale.
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Refer to Exercise 7.9 on page 295.

a. Use your answers from Exercise 7.9(b) to determine the mean, μs, of the variable x¯for each of the possible sample sizes.

b. For each of the possible sample sizes, determine the mean, μs, of the variable x¯, using only your answer from Exercise 7.9(a).

Refer to Exercise 7.5 on page 295.

a. Use your answers from Exercise 7.5(b) to determine the mean, μs, of the variable x¯for each of the possible sample sizes.

b. For each of the possible sample sizes, determine the mean, μs, of the variable x¯, using only your answer from Exercise 7.5(a).

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