TV sets: According to the Nielsen Company, the mean number of TVsets in a U.S. household in 2013 was 2.24 . Assume the standarddeviation is 1.2 . A sample of 95 households is drawn. Use theCumulative Normal Distribution Table if needed.
What is the probability that the sample mean number of TV setsis greater than 2? Round your answer to four decimal places.
What is the probability that the sample mean number of TV setsis between 2.5 and 3? Round your answer to four decimal places.
Find the 80th percentile of the sample mean. Round your answerto two decimal places.
Would it be unusual for the sample mean to be less than 2? Roundyour answer to four decimal places.
| It â–¼(Choose one) unusual becausethe probability of the sample mean being less than 2 is . | |
