SOLUTION: a certain group of test subjects had pulse rates with a mean of 74.9 beats per minute and a standard deviation of 13.1 beats per minute. Would it be unusal for one of the test subj

Question 892923: a certain group of test subjects had pulse rates with a mean of 74.9 beats per minute and a standard deviation of 13.1 beats per minute. Would it be unusal for one of the test subjects to have a pulse rate of 131.1 beats per minute?
Minimum "usual" value = ------ beats per min
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a certain group of test subjects had pulse rates with a mean of 74.9 beats per minute and a standard deviation of 13.1 beats per minute. Would it be unusal for one of the test subjects to have a pulse rate of 131.1 beats per minute?
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z(131.1) = (131.1-74.5)/13.1 = 4.32
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Ans: Yes, because 131.1 bpm is more than 4 std above the mean.
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Minimum "usual" value = ------ beats per min
Ans: Depends on how "usual" is defined.
Cheers,
Stan H.
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