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There is an R function dedicated to finding the standard deviation of a dataset — we can cut out the step of first finding the variance. The R function sd() takes a dataset as a parameter and returns the standard deviation of that dataset:
Instructions
1.
We’ve removed the code that calculated the variance of each dataset. By using sd() we don’t need to take that middle step anymore.
Call sd() using nba_data as a parameter, and store the result in nba_standard_deviation.
Make a similar function call using okcupid_data and store the result in okcupid_standard_deviation.
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