Answer :
The mean resting heart rate for this sample is 69.9 beats per minute.
To find the mean resting heart rate, we need to add up all of the values in the stemplot and divide by the number of values.
The values in the stemplot are:
55, 63, 65, 69, 69, 69, 69, 70, 71, 73, 73, 74, 75, 76, 77
There are 15 values in the stemplot.
Therefore, the mean resting heart rate is:
(55 + 63 + 65 + 69 + 69 + 69 + 69 + 70 + 71 + 73 + 73 + 74 + 75 + 76 + 77) / 15 = 69.9 beats per minute
Therefore, the answer is (c) 69.9 beats per minute.
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