An Investigation of the Effectiveness of a Training Program to Improve

question 7

Multiple Choice

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and a post-training customer survey. To compare the differences,they computed post-training survey score − pre-training survey score. Seven customers were randomly selected and completed both surveys. The results are shown here. This analysis is an example of ________.

• A)a one-sample test of means
• B)a two-sample test of means
• C)a paired t-test
• D)a test of proportions

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Definitions:

Simplify

The process of reducing a mathematical expression or equation to its most concise and simple form, removing parenthesis and combining like terms when possible.

Rational Expression

A fraction where both the numerator and the denominator are polynomials.

Domain

The set of all possible input values for a function.

Rational Function

A function represented by the ratio of two polynomials.