A Lab Orders 100 Rats a Week for Each of the 52

question 106

Multiple Choice

A lab orders 100 rats a week for each of the 52 weeks in the year for experiments that the lab conducts. Suppose the mean cost of rats used in lab experiments turned out to be $13.00 per
Week. Interpret this value.

• A) Most of the weeks resulted in rat costs of $13.00.
• B) The median cost for the distribution of rat costs is $13.00.
• C) The expected or mean cost for all weekly rat purchases is $13.00.
• D) The rat cost that occurs more often than any other is $13.00.

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Definitions:

ANOVA F Statistic

A statistic used in Analysis of Variance (ANOVA) tests to determine if there are significant differences between the means of three or more groups.

Significance Level

A threshold chosen by the researcher which the p-value must be below in order to reject the null hypothesis.

Explanatory Variables

Variables in a statistical model that are used to predict or explain changes in the dependent variable.

Deaths

The occurrence of the permanent cessation of all vital functions in a living organism, marking the end of life.