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# Usual and Unusual Values. In Exercises, consider a value ISBN: 9780321836960 18

## Solution for problem 9BSC Chapter 3.4

Elementary Statistics | 12th Edition

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Problem 9BSC

Usual and Unusual Values. In Exercises, consider a value to be unusual if its z score is less than −2 or greater than 2.

IQ Scores The Wechsler Adult Intelligence Scale measures IQ scores with a test designed so that the mean is 100 and the standard deviation is 15. Consider the group of IQ scores that are unusual. What are the z scores that separate the unusual IQ scores from those that are usual? What are the IQ scores that separate the unusual IQ scores from those that are usual?

Step-by-Step Solution:

Answer:

Step 1 of 1

Here, Unusual values are below 2 standard deviation about the mean or above 2 standard deviation about the mean.

Z scores of –2 and 2.

A z score of –2 means a score of  x = 100 - 2(15)

= 70

A z score of +2 means a score of  x = 100 + 2(15)

= 130.

.

Step 2 of 1

##### ISBN: 9780321836960

This full solution covers the following key subjects: scores, unusual, usual, those, separate. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. Elementary Statistics was written by and is associated to the ISBN: 9780321836960. Since the solution to 9BSC from 3.4 chapter was answered, more than 571 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. The answer to “Usual and Unusual Values. In Exercises, consider a value to be unusual if its z score is less than ?2 or greater than 2.IQ Scores The Wechsler Adult Intelligence Scale measures IQ scores with a test designed so that the mean is 100 and the standard deviation is 15. Consider the group of IQ scores that are unusual. What are the z scores that separate the unusual IQ scores from those that are usual? What are the IQ scores that separate the unusual IQ scores from those that are usual?” is broken down into a number of easy to follow steps, and 90 words. The full step-by-step solution to problem: 9BSC from chapter: 3.4 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM.

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Usual and Unusual Values. In Exercises, consider a value