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 (in minutes) below. 
To test the null hypothesis, the appropriate probability distribution to use is
Definitions:
Economics
The social science that studies how goods and services are produced, distributed, and consumed, and how individuals, businesses, and governments make choices given limited resources.
Institutions
Structures or mechanisms of social order governing the behavior of a set of individuals within a given community, including laws, norms, and organizations.
Society
An organized group of individuals living together in a structured community with shared laws, traditions, and values.
Economizing Problem
The need to make choices about how to best use limited resources to satisfy unlimited wants.
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