Question 309563: If a population has a normal distribution with m=7 and o=9, and we take sample size of 10, find the probability that the mean of the means ,mx will be between P(6< mx <8)
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! If a population has a normal distribution with m=7 and o=9, and we take sample size of 10, find the probability that the mean of the means ,mx will be between P(6< mx <8)
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z(6) = (6-7)/[9/sqrt(10)] = -0.3514
z(8) = (8-7)/[9/sqrt(10)] = +0.3514
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P(6 < x-bar < 8) = P(-0.3514 < z < +0.3514) = 0.2747
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Cheers,
Stan H.
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