Find the Indicated Probability or Percentage for the Sampling Error

Multiple Choice

Find the indicated probability or percentage for the sampling error.
-The monthly expenditures on food by single adults living in one neighborhood of Los Angeles are normally distributed with a mean of $410 and a standard deviation of $60. Determine the
Percentage of samples of size 9 that will have mean monthly expenditures on food within $16 of
The population mean expenditure of $410.

A) 21.28%
B) 98.36%
C) 57.62%
D) 91.92%