A particular weight-loss company claims that the average weight a person lost after two weeks on its program is 5 lbs.

The following data represent the weight loss of 36 randomly selected adults who have been on the program for two weeks.

Negative values represent weight gains (oops!). These data can also be found in the Excel file normal weight loss.xlsx.

9 11 6 8 2 -4 7 0 8 10 11 2 4 5 5 7 11 3 4 10 5 5 9 7 7 -1 0 4 1 9 -2 1 7 0 7 3

a. Using a = 0.05, perform a chi-square test to determine if the weight loss after two weeks on this program follows a normal probability distribution when m = 5.0 and s = 4.0.

b. Determine the p-value using Excel and interpret its meaning.

AppendixLO1