Question 25 of 40 50 Points Which of the following statements is true? A. cannot

Question

Question 25 of 40 50 Points Which of the following statements is true? A. cannot be used when finding a confidence interval for the population mean with a small sample whenever the sample comes tiom a symmetric population. B. The t distribution can be used when finding a confidence interval for the population mean with a small sample whenever the sample comes from a symmetric population C. The p distribution can be used when finding a conftidence intervat for the poputation mean with a small sample whenever the sample comes from a symmetric population D. The p distribution can be used symmetric population. when finding a contidence intervat for the poputation mean with a smat sample whenever the sample comes rom a a confidence Mark for Reviewymarsms? PreviousNext zes

Explanation / Answer

The correct option is B

Because t test is known as exact test and we can used it to test the population mean as well as to estimate confidence interval for the population mean.

The assumptions for using t test are

1) the data comes from normal population ( or symmetric distribution)

2) Population standard deviation is unknown

3) if the sample size is large ( >= 30) then we don't need the assumption of normality .

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