State whether each of the following changes would make a confidence interval wid

Question

State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.) a. Changing from a 99% confidence level to a 90% confidence level b. Changing from a sample size of 20 to a sample size of 400 c. Changing from a standard deviation of 25 pounds to a standard deviation of 20 pounds Click the icon to view the t-table. a. How will changing from a 99% confidence level to a 90% confidence level affect the width of the confidence interval? A. The interval will become wider O B. The interval will become narrower O C. This change will not affect the width of the interval. b. How will changing from a sample size of 20 to a sample size of 400 affect the width of the confidence interval? O A. The interval will become wider O B. The interval will becomne narrower ° C. This change will not affect the width of the interval Y 11 Click to select your answer

Explanation / Answer

a) option a is correct

b) option c is correct . . . . . . . . . . . . . . . . . . . . . .. .. . . . .

c) option a is correct. . . . . . . . . . . . . . .

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