Compare two different companies or compare one company vs ACME error before and Brand X error before and Hypothesized mean after maintenance after maintenance ACME ACME Brand X Brand X Altimeter Altimeter Altimeter Altimeter error before | error after error before error after adjustment- Altimeter Altimeter Altimeter Altimeter Altimeter Altimeter adjustment- adjustment- adjustment- Brand B Brand C Brand D Brand E Brand F calibration |calibration calibration calibration Brand A 38 16 47 42 39 41 9 14 0 42 38 32 35 6 4 7 11 0 0 18 4 29 4 12 6 32 33 4 3 4 26 31 22 38 25 4 33 36 28 10 12 42 25 9 26 6 30 9 29 20 21 22 3 32 1 32 9 32 25 25 42 38 4 5 19 9 45 5 29 10 10 9 44 10 32 40 45 32 19 7 17 4 11 29 14 34 31 9 13 23 3 31 20 37 27 23 30 11 34 39 13 38 36 26 15 48 42 1 31 27 25 6 15 14 33 45 29 10 EN 36 43 43 34 19 14 14 11 10 22 8 49 18 12 26 9 38 10 2 1 4 20 49 23 9 20 26 36 32 25 42 5 43 43 46 47 17 3 43 3 46 23 36 44 1 5 26 0 47 10 12 19 17 10 12 * 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