Practical Final Exam PART 1 Wells Baldwin

t-Test: Paired Two Sample for Means Variable 1 Variable 2 Mean 75.35 29.15 Variance 1972.765789474 723.923684 Observations 20 20 Pearson Correlation 0.215140594885 Hypothesized Mean Difference 0 df 19 t Stat 4.422638255082 P(T<=t) one-tail 0.000146140543 t Critical one-tail 1.729132811521 P(T<=t) two-tail 0.000292281087 t Critical two-tail 2.093024054408

126 20 148 41 26 117 123 27 0 14 96 5 18 12 21 33 40 32 92 45 36 18 96 12 9 12 78 33 66 114 75 12 90 40 84 30 36 126 75 27 27 26 75 33 66 9 96 3 135 30 75 15 99 124 12 15 96 17 87 30 30 27 132 30 120 22 96 17 21 51 12 33 65 15 102 23 27 39 69 9 111 26 69 26 33 102 117 39 81 34 108 18 45 144 126 3 75 18 130 24 59 135 87 30 108 29 129 20 57 62 42 33 30 36 50 147 54 36 78 27 43 14 130 12 60 147 69 6 27 60 78 44 96 75 126 15 129 129 138 41 51 9 129 9 138 9 69 53 87 15 3 15 57 0 151 30 36 141 30 36 * Note - Error (distance from zero) achieved by converting data to absolute values. Compare two different companies or compare one company vs Hypothesized mean ACME error before and after maintenance Altimeter Brand A Altimeter Brand B Altimeter Brand C Altimeter Brand D Altimeter Brand E Altimeter Brand F ACME Altimeter error before adjustment- calibration ACME Altimeter error after adjustment- calibration

FINAL PRACTICA 42 0 Part I Questi 24 15 99 12 A) Describe what you are comparin 99 27 78 18 I am comparing two different com 96 4 57 2 B) State your hypothesis in a sente 21 12 87 6 (Your hypothesis does not have to 93 16 65 18 The average of Brand A's populati 93 9 16 18 C) Indicate the appropriate t-test t 33 15 33 21 Two sample t-test using distributio 87 15 96 9 D) State the alpha level. 57 6 78 18 α=0.05 96 15 FINAL PRACTICAL E) State the hypothesis in a sentence (fo The average of Brand A's population F) Express that idea using scientific nota Null Hypothesis - H0: > α Brand X error before and after maintenance Brand X Altimeter error before adjustment- calibration Brand X Altimeter error after adjustment- calibration

Null Hypothesis - H0: > α G) State the appropriate t-test used to e Two sample t-test using distributio H) Alpha (α) level α=0.05 I) P-value p =0.000292281 J) State in a sentence or two whether t

Alternate Hypothesis - HA: ≠ α evaluate the hypothesis and show results table on Ho hypothesis the hypothesis is rejected or if there is not enough evidence to reject the null hypotheses and what the resu