3. (4) Section 3-2, #30, page 97. [Show your procedure for thegrouped mean; comp

Question

3. (4) Section 3-2, #30, page 97. [Show your procedure for thegrouped mean; compare it to the ungrouped mean, given in thedirections to this problem.]

In exercise 29-32, find the mean of the data summarized in thegiven frequency distribution. also compare the computed means tothe actual means obtained by using the original list of datavalues, which are as follows: (exercise29)21.1 mg; (exercise30)76.3 beats per minute; (exercise 310 46.7 mi/h; (exercise 32)1.911lb.

Pulse Rate ofFemales                      frequency

60-69                                                        12

70-79                                                        14

80-89                                                        11

90-99                                                        1

100-109                                                   1

110-119                                                   0

Explanation / Answer

class class mark frequency mark* frequency 60-69 64.5 12 774 70-79 74.5 14 1043 80-89 84.5 11 929.5 90-99 94.5 1 94.5 100-109 104.5 1 104.5 110-119 114.5 0 0 120-129 124.5 1 124.5 40 76.75 total sum (mark*freq)/total ...76.3 is ungrouped mean, grouped mean is close

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