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For a normal population with a mean of µ = 80 and a standard deviation of σ = 10, what is the probability of obtaining a sample mean greater than m = 75 for a sample of n = 25 scores?
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For a normal population with a mean of µ = 80 and a standard deviation of σ = 10, what is the probability of obtaining a sample mean greater than m = 75 for a sample of n = 25 scores?

User Brian Bruman
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1 Answer

6 votes
On a TI-83/84 calculator,
.. normalcdf(75, 150, 80, 10/√(25)) = 0.9937903347

About 99.4%
User HereTrix
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