91Ó°ÊÓ

Using a random sample of 4000 TV households, Nielsen Media Research found that \(60.2 \%\) watched the final episode of \(M^{*} A^{*} S^{*} H\). a. Find the margin of error in this percent. b. Write a statement about the percentage of TV households in the population that tuned into the final episode of \(M^{*} A^{*} S^{*} H\).

What is a symmetric histogram?

Describe how to determine the \(z\)-score for a data item in a normal distribution.

If you score in the 83 rd percentile, what does this mean?

If your weight is in the third quartile, what does this mean?

Two students have scores with the same percentile, but for different administrations of the SAT. Does this mean that the students have the same score on the SAT? Explain your answer.

Give an example of a phenomenon that is normally distributed. Explain why. (Try to be creative and not use one of the distributions discussed in this section.) Estimate what the mean and the standard deviation might be and describe how you determined these estimates.

Give an example of a phenomenon that is not normally distributed and explain why.