In constructing a confidence interval, suppose a student decides
to decrease the level of confidence from 95% to 90 %. Assume all
other quantities of interest remain unchanged. Which answer best
describes the resulting effect (if any) on the confidence
interval?

Select one:

a. The width of the confidence interval will be narrower.

b. The width of the confidence interval will be unchanged.

c. The width of the confidence interval will be wider.

d. The upper and lower limits of the confidence interval will be
shifted down by an equal distance.

e. The confidence interval will no longer contain µ.