The value of s for a relationship between number of seconds, x, and number of jumping jacks of an athlete, y, is calculated as 3.0725.Which of the following statements is the best interpretation of s?

The value s describes the typical size of the residuals, and it is measured in the units of y. Here, y is the number of jumping jacks, so 3.0725 is in jumping jacks—not seconds. Thus the best choice is “The average residual is about 3.0725 jumping jacks,” although s more precisely describes a typical residual size rather than the average residual.

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