If we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the:___________.

A. width of the confidence interval to increase.

B. width of the confidence interval to decrease.

C. width of the confidence interval to remain the same.

D. sample size to increase.

A 95% confidence interval provides a interval with a 95% probability that the true population parameter lies in it , where 99% confidence interval provides a interval with a 99% probability that the true population parameter lies in it .

Probability of getting true population parameter increases if the width of the interval increases.

Hence, if we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the width of the confidence interval to increases.

hence, the correct option is A.

If we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the:___________. A. width of the confidence interval to increase. B. width of the confidence interval to decrease. C. width of the confidence interval to remain the same. D. sample size to increase.

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