The mean amount of money spent on lunch per week for a sampl

The mean amount of money spent on lunch per week for a sample o f273 students is $22. If the margin of error for the population mean with a 98%confidence interval is 2, construct a 98%confidence interval for the mean amount of money spent on lunch per week for all students.

Solution

The confidence interval is sample mean +/- margin of error = 22 +/- 2 = (20,24)