Chapter 6.2, Problem 2LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

For a normal distribution, find the *z*-score location that divides the distribution as follows:

**a**. Separate the top 20*%* from the rest.

**b.** Separate the top 60% from the rest.

**c.** Separate the middle 70% from the rest.

**(a)**

To determine

**To find:** The z-score location that divides the distribution as separate the top 20% from the rest.

Explanation

**Given info:**

The z-score separates top 20% from the rest.

**Calculation:**

*Calculating the probability value by using the EXCEL procedure:*

The formula is

**(b)**

To determine

**To find:** The z-score location that divides the distribution as separate the top 60% from the rest.

**(c)**

To determine

**To find:** The z-score location that divides the distribution as separate the middle 70% from the rest.

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