The standard deviation of a normal population is 10. You take a sample of 25 items from this population and compute a 95% confidence interval. In order to compute the confidence interval, you will use a. the t table because the degrees of freedom will be 24. b. the t table because you have estimated the standard deviation from the sample. c. the z table because the population standard deviation is known. d. the z table because the sample size is small. e. none of the above

MATLAB: An Introduction with Applications
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The standard deviation of a normal population is 10. You take a sample of 25 items from this population and
compute a 95% confidence interval. In order to compute the confidence interval, you will use
a. the t table because the degrees of freedom will be 24.
b. the t table because you have estimated the standard deviation from the sample.
c. the z table because the population standard deviation is known.
d. the z table because the sample size is small.
e. none of the above
Transcribed Image Text:The standard deviation of a normal population is 10. You take a sample of 25 items from this population and compute a 95% confidence interval. In order to compute the confidence interval, you will use a. the t table because the degrees of freedom will be 24. b. the t table because you have estimated the standard deviation from the sample. c. the z table because the population standard deviation is known. d. the z table because the sample size is small. e. none of the above
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