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:

Mean

The mean is the average of a set of numbers, calculated by dividing the sum of these numbers by their count.

Normally Distributed

Describes a distribution that follows a bell-shaped curve, where the mean, median, and mode are equal; commonly used in probability and statistics.

Standard Deviation

A measure of the amount of variation or dispersion in a set of values, indicating how much the values deviate from the mean of the set.

Mean

The average of a set of numerical values, calculated by dividing the sum of the values by the number of values.