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VIP Practice Exercise: Confidence Intervals

Practice Exercise: Confidence Intervals

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Question 1 of 10

A confidence interval is...

A

a range of values likely to include the population parameters

B

the values that define the range of values likely to include the population parameters

C

the probability value associated with the range of values likely to include the population parameters

D

none of the above

Question 2 of 10

The confidence limits are...

A

a range of values likely to include the population parameters

B

the values that define the range of values likely to include the population parameters

C

the probability value associated with the range of values likely to include the population parameters

D

none of the above

Question 3 of 10

The confidence level is...

A

a range of values likely to include the population parameters

B

the values that define the range of values likely to include the population parameters

C

the probability value associated with the range of values likely to include the population parameters

D

none of the above

Question 4 of 10

Which of the following is an example of a confidence interval?

A

13.43 to 31.47

B

13.43 and 31.47

C

13.43%

D

13.43

Question 5 of 10

Which of the following is an example of confidence limits?

A

13.43 to 31.47

B

13.43 and 31.47

C

13.43%

D

13.43

Question 6 of 10

Which of the following is an example of a confidence level?

A

13.43 to 31.47

B

13.43 and 31.47

C

13.43%

D

13.43

Question 7 of 10

A sample is...

A

any total group of people, things, or events that are the target of interest in a research study

B

a subset of a group of people, things, or events used to make inferences about the total group

C

a subset of people from a larger population of people

D

the total number of people of any group who are the target of interest in a research study

Question 8 of 10

The reason we use samples for conducting research instead of populations is...

A

It would take too much time to reach the entire population

B

It would be too costly to reach the entire population

C

It is impossible to access every member of the population

D

All of the above

Question 9 of 10

According to the central limit theorem, the sampling distribution of sample means forms a normal distribution when...

A

the sample size of your sample distributions is 30 or greater

B

the number of samples in your sampling distribution is 30

C

there are 30 sample means from a population

D

the sample size is 30 and there are 30 sample means

Question 10 of 10

According to the central limit theorem...

A

the standard deviation is equal to the population standard deviation

B

the standard deviation divided by sqrt(N) equals the standard error of the mean

C

the sampling distribution of the standard deviations equals the population standard deviation

D

the standard deviation equals the standard error of the mean

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