Before the Rush Began for Christmas Shopping, a Department Store $\alpha$

question 31

Essay

Before the rush began for Christmas shopping, a department store had noted that the percentage of its customers who use the store's credit card, the percentage of those who use a major credit card, and the percentage of those who pay cash are the same. During the Christmas rush in a sample of 150 shoppers, 46 used the store's credit card; 43 used a major credit card; and 61 paid cash. With $\alpha$ = 0.05, test to see if the methods of payment have changed during the Christmas rush.

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Definitions:

Correlations

A statistical measure that expresses the extent to which two variables change together.

Groups

Collections of subjects, items, or observations often categorized based on specific characteristics for analysis.

Two-Tailed T Test

A statistical hypothesis test used to determine if there is a significant difference between the means of two groups, with no presumption about the direction of the difference.

Null Hypothesis

A statement or hypothesis that suggests there is no statistical significance between the two variables being studied or no effect of an experimental variable.