Chapter 6, Problem 10P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

Find the *z*-score boundaries that separate a normal distribution as described in each of the following.

**a.** The middle 30% from the 70% in the tails.

**b.** The middle 40% from the 60% in the tails.

**c.** The middle 50% from the 50% in the tails.

**d**. The middle 60% from the 40% in the tails.

**a.**

To determine

**To find:** The*z*-score that separates the middle 30% from the 70% in tail.

Explanation

**Given info:**

Given distribution is normal *z* score separates the middle 30% of the distribution from the 70% in the tail.

**Justification:**

As given in the question that z-score separates the middle 30% of the distribution from the 70% in the tail. It also means that left tail is 35%, in other words the left tail area from z-score value is 0...

**b.**

To determine

The z-score that separates the middle 40% from the60% in tail.

**c.**

To determine

The z-score that separates the middle 50% from the50% in tail.

**d.**

To determine

The *z*-score that separates the middle 60% from the40% in tail.

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