A random sample of 40 professional baseball salaries from 1985 through 2015 was selected. The league of the player (American or National) was also recorded. Salary (in hundred thousand dollars) and league are shown in the table. Test the hypothesis that there is a difference in the mean salary of players in each league. Assume the distributions are Normal enough to use the t-test. Use a significance level of 0.05. 

Transcribed Image Text:

Salary League Salary League 275 American 1600 National 3400 National 5000 American 5725 National 385 National 1500 American 400 American 558.3 National 380 National 320 American 175 American 1791.7 National 400 American 1200 American 900 American 1500 National 62.5 American 3400 National 3200 American 240 National 2500 National 481 National 316.5 American 5050 American 4175 American 491.7 American 500 National 1750 American 1500 American