SOLUTION: Given a normal distribution with a = 100 and σ = 10, if you select a random sample of n = 25, there is a 65% chance that the sample mean is above what value?
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Question 758873: Given a normal distribution with a = 100 and σ = 10, if you select a random sample of n = 25, there is a 65% chance that the sample mean is above what value?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Given a normal distribution with a = 100 and σ = 10, if you select a random sample of n = 25, there is a 65% chance that the sample mean is above what value?
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Find the z-value with a left tail to 0.65 = 0.3853
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Find the correspondiing x-bar value using x-bar = z*s/sqrt(n) + u
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x-bar = 0.3853 + 100 = 100.77
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Cheers,
Stan H.
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