Repeat exercises 5.1 and 5.2 using R. (It is easiest if you use the “describe” command from the “psych” library.)

Exercises 5.1

Calculate the range, the variance, and the standard deviation for data that Katz et al. collected on SAT performance without reading the passage. The data follow

Exercises 5.2

Calculate the range, the variance, and the standard deviation for the Katz et al. data on SAT performance after reading the passage.

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