The following data represent the number of home runs Hank
The following data represent the number of home runs Hank Aaron hit each year during his 23year baseball career.
a. Calculate the mean and standard deviation of these data.
b. Group these data into four classes with class boundaries of 10 to under 20, 20 to under 30, 30 to under 40, and 40 to under 50.
c. Calculate the approximate mean and standard deviation of these grouped data.
d. Explain the difference in the results of part c from those of part a.
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