3.10 The playing times of a sample of 57 contemporary pop albums and a sample of 48...

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3.10 The playing times of a sample of 57 contemporary pop albums and a sample of 48 reissued classic pop albums are summarized in the following grouped frequency distributions:

Playing time

(minutes)

Frequency

(contemporary)

Frequency

(reissue)

30 and under 35 0 4 35 and under 40 7 9 40 and under 45 13 17 45 and under 50 22 15 50 and under 55 10 3 55 and under 60 4 0 60 and under 65 1 0

(a) Find approximate values of the median and mean for each distribution.

(b) Calculate approximate values for the standard deviations of each distribution.

(c) Compare the distributions using your results from (a)

and (b).

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