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?

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STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884
BuyFind

STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

Solutions

Chapter
Section
Chapter 6.3, Problem 30E
Textbook Problem

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).

  1. a. For a sample of 800 people who play these games, how many would you expect to be under 18 years of age?
  2. 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?
  3. 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?

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Chapter 6 Solutions

STATISTICS F/BUSINESS+ECONOMICS-TEXT
Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - The mean cost of domestic airfares in the United...Ch. 6.2 - The average return for large-cap domestic stock...Ch. 6.2 - Automobile repair costs continue to rise with the...Ch. 6.2 - The average price for a gallon of gasoline in the...Ch. 6.2 - A person must score in the upper 2% of the...Ch. 6.2 - Television viewing reached a new high when the...Ch. 6.2 - The time needed to complete a final examination in...Ch. 6.2 - The American Automobile Association (AAA) reported...Ch. 6.2 - New York City is the most expensive city in the...Ch. 6.3 - A binomial probability distribution has p = .20...Ch. 6.3 - Assume a binomial probability distribution has p =...Ch. 6.3 - Although studies continue to show smoking leads to...Ch. 6.3 - A CBS News/New York Times survey found that 97% of...Ch. 6.3 - Playing video and computer games is very popular....Ch. 6.3 - The Bank of America trends in Consumer Mobility...Ch. 6.4 - Consider the following exponential probability...Ch. 6.4 - Consider the following exponential probability...Ch. 6.4 - Battery life between charges for the Motorola...Ch. 6.4 - The time between arrivals of vehicles at a...Ch. 6.4 - Comcast Corporation is the largest cable...Ch. 6.4 - Wendys restaurant has been recognized for having...Ch. 6.4 - The Boston Fire Department receives 911 calls at a...Ch. 6 - A business executive, transferred from Chicago to...Ch. 6 - The NCAA estimates that the yearly value of a full...Ch. 6 - Motorola used the normal distribution to determine...Ch. 6 - During early 2012, economic hardship was...Ch. 6 - The port of South Louisiana, located along 54...Ch. 6 - Ward Doering Auto Sales is considering offering a...Ch. 6 - The XO Group Inc. conducted a survey of 13,000...Ch. 6 - Assume that the test scores from a college...Ch. 6 - According to the National Association of Colleges...Ch. 6 - A machine fills containers with a particular...Ch. 6 - Consider a multiple-choice examination with 50...Ch. 6 - A blackjack player at a Las Vegas casino learned...Ch. 6 - The Information Systems Audit and Control...Ch. 6 - The website for the Bed and Breakfast Inns of...Ch. 6 - Do you dislike waiting in line? Supermarket chain...Ch. 6 - The time (in minutes) between telephone calls at...

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