# Question

Advertising researchers have developed a theory that states that commercials that appear in violent television shows are less likely to be remembered and will thus be less effective. After examining samples of viewers who watch violent and nonviolent programs and asking them a series of five questions about the commercials, the researchers produced the following probability distributions of the number of correct answers.

a. Calculate the mean and standard deviation of the number of correct answers among viewers of violent television programs.

b. Calculate the mean and standard deviation of the number of correct answers among viewers of nonviolent televisionprograms.

a. Calculate the mean and standard deviation of the number of correct answers among viewers of violent television programs.

b. Calculate the mean and standard deviation of the number of correct answers among viewers of nonviolent televisionprograms.

## Answer to relevant Questions

Refer to Exercise 7.22.a. Determine the probability distribution of the amount of money the arcade takes in per child.b. Use the probability distribution to calculate the mean and variance of the amount of money the arcade ...A random variable is uniformly distributed between 5 and 25.a. Draw the density function.b. Find P(X > 25).c. Find P(10 < X < 15).d. Find P(5.0 < X < 5.1).The following is a graph of a density function.a. Determine the density function.b. Find the probability that X is greater than 10.c. Find the probability that X lies between 6 and12.Refer to Exercise 8.40. If we wanted to be sure that 98% of all bulbs last longer than the advertised figure, what figure should be advertised?The amount of time devoted to studying statistics each week by students who achieve a grade of A in the course is a normally distributed random variable with a mean of 7.5 hours and a standard deviation of 2.1 hours.a. What ...Post your question

0