Exhibit 19-4 A Company Advertises That Food Preparation Time Can Be Significantly

Multiple Choice

Exhibit 19-4
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 19-4. The test statistic equals

A) -0.81 or 0.81
B) -0.89 or 0.89
C) -10 or 10
D) -20 or 20