# Question

Based on the 1990 census, the number of hours per day adults spend watching television is approximately normally distributed with a mean of 5 hours and a standard deviation of 1.3 hours.

a. What proportion of the population spends more than 7 hours per day watching television?

b. In a 1998 study of television viewing, a random sample of 500 adults reported that the average number of hours spent viewing television was greater than 5.5 hours per day. Do the results of this survey appear to be consistent with the 1990 census?

a. What proportion of the population spends more than 7 hours per day watching television?

b. In a 1998 study of television viewing, a random sample of 500 adults reported that the average number of hours spent viewing television was greater than 5.5 hours per day. Do the results of this survey appear to be consistent with the 1990 census?

## Answer to relevant Questions

The level of a particular pollutant, nitrogen oxide, in the exhaust of a hypothetical model of car, the Polluter, when driven in city traffic has approximately a normal distribution with a mean level of 2.1 grams per mile ...Let y be a binomial random variable with n = 10 and p = .5. a. Calculate P(4 ≤ y ≤ 6). b. Use a normal approximation without the continuity correction to calculate the same probability. Compare your results. How well ...The breaking strengths for 1-foot-square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2,250 pounds per square inch (psi) and a standard deviation of 10.2 psi. Find the ...In the research study on percentage of calories from fat, a. What is the population of interest? b. What dietary variables other than PCF might affect a person’s health? c. What characteristics of the nurses other than ...Refer to Exercise 5.30. In fact, the researcher was more concerned about determining if the lead in the paint reduced the mean number of Type 2 fibers in skeletal muscles. Does the change in the research hypothesis alter ...Post your question

0