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Sometimes we make mistakes, so if we reject the null hypothesis but it was true, then we just made a --Select--- v Submit Answer 14. [-/7.5 Points] DETAILS MY NOTES ASK YOUR TEACHER For a randomly selected sample of Major League Baseball (MLB) players, the average age of the players is 28.9 years, and for a randomly selected sample of National Football League (NFL) players, the average age of the players is 25.3 years. Are MLB players older than NFL players on average? (a) What is the estimate for the difference in mean age (in years) between an MLB player and an NFL player? yr (b) What is the parameter of interest in this problem? the difference of mean ages of all MLB and NFL players the mean age of all professional athletes the mean age of all the sampled athletes the difference of mean ages of the samples of MLB and NFL players (c) What is the appropriate alternative hypothesis? OHa : HMLB - HNFL > 0 OHa: HMLB - HNFL = 0 OHa : HMLB - HNFL * 0 O Ha : HMLB - HNFL