Sketch the distribution of sample means for sample of n 25, Ask an Expert

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A normal shaped distribution has μ= 80 and σ = 15.

a. Sketch the distribution of sample means for sample of n = 25 scores from this population.

b. What are the Z score values that form the bounded areas for the middle 95% of the distribution of sample means?

c. Compute the Z score for M = 89 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?

d. Compute the Z score for M = 84 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?

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