The Daily Revenue from the Sale of Fried Dough at a Local

Multiple Choice

The daily revenue from the sale of fried dough at a local street vendor in Boston is known to be normally distributed with a known standard deviation of $120. The revenue on each of the last 25 days is noted, and the average is computed as $550. A 95% confidence interval is constructed for the population mean revenue. If the data from the last 40 days had been used, then the resulting 95% confidence intervals would have been ________.

A) wider, with a larger probability of reporting an incorrect interval
B) wider, with the same probability of reporting an incorrect interval
C) narrower, with a larger probability of reporting an incorrect interval
D) narrower, with the same probability of reporting an incorrect interval