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Ralph Walters Wanted to Begin an Exercise Program and Decided

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Ralph Walters wanted to begin an exercise program and decided to enroll in a local aerobics class.He was told that he would need proper aerobic work-out shoes.Ralph went to an athletic shoe store and explained his needs to the sales clerk and also added that since he had never done aerobics,he was unsure what type of shoe he would need.The sales clerk recommended a shoe that Ralph purchased.When Ralph arrived at aerobics class,his instructor said his shoes were not appropriate for aerobics and that Ralph might injure himself if he used them for the workout.When Ralph returned to the store with the shoes,the store refused to exchange them,citing the three-day limitation on returns.Suppose Ralph's sales receipt had stamped on it in red letters "AS IS." The shoe store:


Definitions:

Explanatory Variable

An explanatory variable, also known as an independent variable, is a variable in statistical modeling that is manipulated to assess its effects on a dependent variable.

Normally Distributed

Describes a data distribution shaped like a symmetrical bell curve, with mean, median, and mode all equal.

Parameters

Parameters are specific numerical or categorical boundaries set within a study or experiment that define the data to be collected or the conditions under which the study is conducted.

Degrees of Freedom

The number of independent values in a dataset that are free to vary when estimating statistical parameters or testing hypotheses.

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