Homework: HW 3.3 Save Score: 0.67 of 1 pt 8 of 15 (15 complete) Score: 82.22%, 1

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Homework: HW 3.3 Save Score: 0.67 of 1 pt 8 of 15 (15 complete) Score: 82.22%, 12.33 of 15 pts 3.3.33 Question Help A certain group of test subjects had pulse rates with a mean of 76.5 beats per minute and a standard deviation of 11.6 beats per minute. Would it be unusual for one of the test subjects to have a pulse rate of 79.7 beats per minute? Minimum "usual value 53.3 beats per minute Type an integer or a decimal.) Maximum "usual" value99.7 beats per minute Type an integer or a decimal.) Is 79.7 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 larger than the maximum "usual" value. C. D. No, because it is smaler than the minimum "usual" value. No, because it is between the minimum and maximum-usual" values. O E. Yes, because it is smaller than the minimum "usual" value. F. Yes, because it is between the minimum and maximum "usual" values.

Explanation / Answer

Given that mean = 76.5 and standard deviation = 11.6

a)

minimum "usual" value = mean - 2*sd = 76.5 - 2*11.6 = 53.3 beats per minute

b)

maximum "usual" value = mean + 2*sd = 76.5 + 2*11.6 = 99.7 beats per minute

c)

79.7 is in range between minimum "usual" value and maximum "usual" value i.e [53.3, 99.7]. so it is not unusual value

so answer is (D) No, beacuse it is between minimum "usual" value and maximum "usual" value

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