Chapter 7.4, Problem 1LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

If a sample is selected from a population with a mean of μ = 120 and a standard deviation of σ = 20, then, on average, how much difference should there be between the sample mean and the population mean

**a.**for a sample of*n =*25 scores?**b.**for a sample of*n =*100 scores?

**(a)**

To determine

**To find:** The difference between the sample mean and population mean.

Explanation

**Given info:**

The sample is selected from a population with a mean of

**Calculation:**

*Standard error:*

The standard error provides a measure of how much distance is expected on average between a sample mean and the population mean.

*Value of standard error:*

**(b)**

To determine

**To find:** The difference between the sample mean and population mean.

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