The following data values represent the number of homeruns a baseball player hit each year during his 25-year baseball career. Complete parts a through d
below.
27
|
45
|
43
|
14
|
10
|
49
|
15
|
23
|
21
|
44
|
44
|
21
|
|
28
|
12
|
49
|
13
|
23
|
29
|
16
|
31
|
42
|
41
|
35
|
41
|
16
|
a. Calculate the mean of these data values.
b. Group this data into four classes with class boundaries of 10-under 20, 20-under 30, 30-under 40, and 40-under 50.
c. Calculate the approximate mean of these grouped data values
Calculate the approximate standard deviation of these grouped data values.
d. Explain the difference in the results from part a and c.
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