Chapter 7.3, Problem 3LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

What are the boundaries for the middle 50% of all possible random samples of *n* = 25 scores selected from a normal population with μ = 80 and σ = 10?

To determine

**To find:** The boundaries for the middle 50% of all possible random samples of

Explanation

**Given info:**

The random sample of

**Calculation:**

*The formula for calculating the z-score:*

Where,

The boundaries for the middle 50% of all possible random samples of

So,

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