A certain group of test subjects had pulse rates with a mean of 81 4 beats per m

Question

A certain group of test subjects had pulse rates with a mean of 81 4 beats per minute and a standard deviation of 12 8 beals per minute Would it be unusual for one of the test subjecds to have a pulse rate of 117.0 beats per minute? Minimum "usual" value beats per minute Type an integer or a decimal) Maximum "usual" valuebeats per minute Type an integer or a decimal) Is 117.0 beats per minute an unusual pulse rate? O A. No, because it is larger than the maximum "usual" value O B. Yes, because it is smaller than the minimum "usual" value ?. Yes. because it is between the minimum and maximum "usual" values 1s 9

Explanation / Answer

as usual values are 2 std deviation from mean

minimum usual value =mean-2*std deviation=81.4-2*12.8=55.8

maximum usual value =mean+2*std deviation=81.4+2*12.8=107.0

option F is correct

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