Explore BrainMass

# Statistics - Hypothesis test and P-value

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Ages for the 2005 Boston Red Sox pitchers are shown below. (a) Assuming this is a random sample of major league pitchers, at the 5 percent level of significance does this sample show that the true mean age of all American League pitchers is over 30 years? State your hypotheses and decision rule and show all work. (b) If there is a difference, is it important? (c) Find the p-value and interpret it. (Data are from http://boston.redsox.mlb.com.)

https://brainmass.com/statistics/hypothesis-testing/statistics-hypothesis-test-and-p-value-244605

#### Solution Preview

(a) H0: The true mean age of the players is not greater than 30 years

Ha: The true mean age of the players is > 30 years

Upper-tailed t- test at a = 0.05

Degrees of freedom = 11; ...

#### Solution Summary

A Complete, Neat and Step-by-step Solution is provided.

\$2.49