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Mathematics

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A random sample of n=9 scores is obtained from a population with μ=50 and σ=9. If the sample mean is M=53, what is the z-score corresponding to the sample mean?

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princessesther2011 princessesther2011

Today at 5:34 PM

Answer:

The z-score corresponding to the sample mean is 1

Step-by-step explanation:

z-score = (sample mean - population mean) ÷ (sd/√n)

sample mean = 53, population mean = 50, sd = 9, n = 9

z-score = (53 - 50) ÷ (9/√9) = 3÷3 = 1

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