Pretzel Boys sells hand-rolled pretzels that are prepared by its employees on the premises. Management would like to ensure that the weight of the pretzels rolled by the employees is consistent by ensuring that the standard deviation for the weight of pretzels is less than 0.04 ounces. The following data represent the weights, in ounces, of 12 randomly selected pretzels. These data can be found in the Excel file Pretzel Boys.xlsx.

0.38 0.36 0.36 0.38 0.36 0.39 0.32 0.33 0.30 0.33 0.37 0.40

a. Using a = 0.05, determine if the standard deviation of the pretzel weights is less than 0.04 ounces.

b. Verify your results using PHStat.

c. Interpret the p-value obtained from the software.

AppendixLO1