8. Given a normal random variable X with a mean of 20, a variance of 9, and a random sam algm takenfrom the distribution, whatsample size (n)isnecessaryin orderthat P(19.9< X <20.1 lug .miisiugoy imoadt l.dat ni sa olgmsa adi 9. Suppose that systolic blood pressures of a certain population are normally distribute mean of 120, a standard deviation of 4, and a sample size 28 is taken from this pop what is the probability that a single sample will have a mean blood pressure of less t 10. Study reports that the average person uses 120 liters of water daily. If the standard c is 20 liters, find the probability that the mean of randomly selected sample of 15 peop between 120 and 125 liters.
8. Given a normal random variable X with a mean of 20, a variance of 9, and a random sam algm takenfrom the distribution, whatsample size (n)isnecessaryin orderthat P(19.9< X <20.1 lug .miisiugoy imoadt l.dat ni sa olgmsa adi 9. Suppose that systolic blood pressures of a certain population are normally distribute mean of 120, a standard deviation of 4, and a sample size 28 is taken from this pop what is the probability that a single sample will have a mean blood pressure of less t 10. Study reports that the average person uses 120 liters of water daily. If the standard c is 20 liters, find the probability that the mean of randomly selected sample of 15 peop between 120 and 125 liters.
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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