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The 30 Major League Baseball teams are divided into two "leagues" of 15 teams each: the...

The 30 Major League Baseball teams are divided into two "leagues" of 15 teams each: the American League and the National League. A random sample of 48 American League players and a random sample of 48 National League players were selected. The sample mean and standard deviation of the salaries of the sampled players is shown in the table below.

League Mean salary in millions USD SD of salary in millions USD
American 3.435 5.879
National 3.476 6.669

1. A statistically-minded baseball fan wants to use statistical inference to determine if the salaries of the players in the American League are different from the salaries of the players in the National League. Select the appropriate hypotheses for this research question.
A. H0H0: μ1μ1 = μ2μ2 vs. HAHA: μ1μ1 > μ2μ2
B. H0H0: μ1μ1 = μ2μ2 vs. HAHA: μ1μ1 < μ2μ2
C. H0H0: μ1μ1 = μ2μ2 vs. HAHA: μ1≠μ1≠ μ2μ2

2. Calculate the appropriate test statistic.  ? z t X^2 F  =

3. Calculate the p-value.

4. Construct a 99% confidence interval for the difference in American League and National League salaries, μAmericanμAmerican - μNationalμNational. ( ,  )

Math   Statistics-And-Probability   
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