# Question

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. 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?

## Answer to relevant Questions

A Bureau of National Affairs survey found that 79% of employers provide their workers with a two-day paid Thanksgiving holiday with workers off both Thursday and Friday (USA today, November 12, 2009). Nineteen percent of ...The NCAA estimates that the yearly value of a full athletic scholarship at in-state public universities is $19,000 (The Wall Street Journal, March 12, 2012). Assume the scholarship value is normally distributed with a ...A machine fills containers with a particular product. The standard deviation of filling weights is known from past data to be .6 ounce. If only 2% of the containers hold less than 18 ounces, what is the mean filling weight ...Consider the following exponential probability density function.ƒ(x) = 1 1/8 e-x/8 for x ≥ 0a. Find P(x ≤ 6).b. Find P(x ≤ 4).c. Find P(x ≥ 6).d. Find P(4 ≤ x ≤ 6).The following stocks make up the Dow Jones Industrial Average (Barron’s, July 30, 2012).Suppose you would like to select a sample of six of these companies to conduct an in-depth study of management practices. Use the ...Post your question

0