A Researcher Is Conducting a Matched?pairs Study

question 51

Multiple Choice

A researcher is conducting a matched?pairs study. She gathers data on each pair in the study resulting in: Assume that the data are normally distributed in the population. The sample standard deviation (s_d) of the differences is ___.

• A) 1.3
• B) 1.14
• C) 1.04
• D) 1.02
• E) 1.47

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The difference between the selling price of a product and its production cost, expressed as a percentage of the selling price.

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