Question

question 18 of 25
which confidence level would produce the widest interval when estimating the mean of a population based on the mean and standard deviation of a sample of that population?
a. 99%
b. 90%
c. 80%
d. 95%

Explanation:

The width of a confidence interval for a population mean depends on the critical value (related to the confidence level). A higher confidence level requires a larger critical value, which increases the margin of error and thus the width of the interval. Among the options, 99% is the highest confidence level, so it produces the widest interval.

Answer:

A. 99%