Use the Following Information to Answer the Question

question 7

Essay

Use the following information to answer the question. A junior high gym teacher recorded the time, in minutes, that it took two of her classes to run one mile. Here are the summary statistics for each class:
Class A: x = 9.6, s = 1.1 Class B: x = 9.9; s = 1.5
-Calculate the sample variance for each class. Round to the nearest hundredth and be sure to use the correct symbols and units.

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Definitions:

Internal Validity

The accuracy with which a study can pinpoint one of various possible factors as the cause of a phenomenon.

External Validity

The degree to which the results of a study may be generalized beyond that study.

Alcohol

A psychoactive substance commonly found in beverages such as beer, wine, and spirits, known for its depressant effects on the central nervous system.

Pregnancy

The condition of being pregnant, involving the development of a fetus inside a woman's uterus.