Nielsen Media Research provides two measures of the television viewing audience: a television program rating, which is the percentage of households with televisions watching a program, and a television program share, which is the percentage of households watching a program among those with televisions in use. The following data show the Nielsen television ratings and share data for the Major League Baseball World Series over a nine-year period (Associated Press, October 27, 2003).

a. Develop a scatter diagram with rating on the horizontal axis.

b. What is the relationship between rating and share? Explain.

c. Compute and interpret the sample covariance.

d. Compute the sample correlation coefficient. What does this value tell us about the relationship between rating and share?

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