Compare two different companies or compare one company vs ACME error before and after Brand X error before and after Hypothesized mean maintenance maintenance ACME ACME Brand X Brand X Altimeter Altimeter Altimeter error Altimeter error error before error after before after Altimeter Altimeter Altimeter Altimeter Altimeter Altimeter adjustment- adjustment- adjustment- adjustment- Brand A Brand B Brand C Brand D Brand E Brand F calibration calibration calibration calibration 42 38 16 47 42 39 41 9 14 38 32 35 29 18 12 32 33 26 31 25 33 10 25 26 20 21 32 32 44 34 10 *Note - Error (distance from zero) achieved by converting data to absolute values. Special thanks to John Barstow (ERAU-WW Adjunct Faculty) for his contribution to this Exam . - Describe what you are comparing. . - State your hypothesis in a sentence. . - Indicate the appropriate t-test that you will use to evaluate your hypothesis. . - State the alpha (a) level