Question

question 9 of 10
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. 42%
b. 31%
c. 57%
d. 23%

Explanation:

The width of a confidence interval for a population mean increases with the confidence level. A higher confidence level requires a larger critical value (e.g., z-score or t-score), which expands the interval to capture the population mean with greater certainty. Among the options, 57% is the highest confidence level.

Answer:

C. 57%