Exhibit 18-3 A Company Advertises That Food Preparation Time Can Be Significantly

Multiple Choice

Exhibit 18-3
A company advertises that food preparation time can be significantly reduced with the Handy Dandy Slicer. A sample of 12 individuals prepared the ingredients for a meal with and without the slicer. You are given the preparation times below.
-Refer to Exhibit 18-3. The hypothesis is to be tested at the 5% level of significance. The decision rule is not to reject the null hypothesis if

A) -1.96 < z < 1.96
B) -1.645 < z < 1.645
C) z > 1.96 or z < -1.96
D) the number of "+" signs is greater than or equal to 2 but less than or equal to 8