SOLUTION: 6. The mean pulse rate for adults is 72 beats per minute (www.healthepic.com) and let’s suppose that the standard deviation is 10. Find:
a. ​The probability that a random
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-> SOLUTION: 6. The mean pulse rate for adults is 72 beats per minute (www.healthepic.com) and let’s suppose that the standard deviation is 10. Find:
a. ​The probability that a random
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Question 727820: 6. The mean pulse rate for adults is 72 beats per minute (www.healthepic.com) and let’s suppose that the standard deviation is 10. Find:
a. The probability that a randomly chosen adult has a pulse rate over 80 assuming that the rates are normally distributed.
b. The probability that a random sample of 19 adults will have a mean pulse rate over 80.
You can put this solution on YOUR website! The mean pulse rate for adults is 72 beats per minute (www.healthepic.com) and let’s suppose that the standard deviation is 10. Find:
a. The probability that a randomly chosen adult has a pulse rate over 80 assuming that the rates are normally distributed.
z(80) = (80-72)/10 = 0.8
P(x > 80) = P(z > 0.8) = normalcdf(0.8,100) = 0.2119
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b. The probability that a random sample of 19 adults will have a mean pulse rate over 80.
z(80) = (80-72)/[10/sqrt(19)] = 3.2985
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P(x-bar > 80) = P(z > 3.2985) = 0.0004861
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Cheers,
Stan H.
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