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13th Edition

Anderson

Publisher: CENGAGE L

ISBN: 9781305881884

Chapter 6.3, Problem 30E

Textbook Problem

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Playing video and computer games is very popular. Over 70% of households play such games. Of those individuals who play video and computer games, 18% are under 18 years old, 53% are 18–59 years old, and 29% are over 59 years old (*The Wall Street Journal,* March 6, 2012).

- a. For a sample of 800 people who play these games, how many would you expect to be under 18 years of age?
- b. For a sample of 600 people who play these games, what is the probability that fewer than 100 will be under 18 years of age?
- c. For a sample of 800 people who play these games, what is the probability that 200 or more will be over 59 years of age?

**a.**

To determine

Find the expected number of people less than 18 years of age play these games.

**Calculation:**

Playing computer and video games are very famous. The 70% of households play these games. By individually, 18% of people fewer than 18 years, 53% of people of 18-59 years and 29% of people of 59 years old are playing these games.

The sample size is 800 people...

**b.**

To determine

Find the probability of fewer than 100 people will play the game less than 18 years of age.

**c.**

To determine

Find the probability of 200 or more than people will play the game over 59 years of age.

STATISTICS F/BUSINESS+ECONOMICS-TEXT

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