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Essentials of Statistics for The B...

9th Edition
Frederick J Gravetter + 2 others
ISBN: 9781337098120

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BuyFindarrow_forward

Essentials of Statistics for The B...

9th Edition
Frederick J Gravetter + 2 others
ISBN: 9781337098120
Textbook Problem

The SAT is standardized so that the average score on the verbal test is 500 each year. If you select a group of 100 graduating seniors who have taken the verbal SAT, what value would be obtained for their average score?

  1. a. 500
  2. b. greater than 500
  3. c. less than 500
  4. d. around 500 but probably not equal to 500

To determine

The average SAT score for a group of 100 graduating seniors.

Explanation

Reason for correct answer:

A sample of 100 graduating seniors will resemble the population characteristics. Therefore, average SAT scores of 100 graduating seniors can be greater than 500 or less than 500 but it will always be around 500. And it’s very rare that average SAT score of 100 graduating seniors is 500.

Reason for incorrect answer:

Option a.: Since, a sample can never represent the population 100% from which it was drawn. So, it is very rare that average of sample observations is same as average of population observations...

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