Question

Consider the data set that is summarized in the Minitab Output below. -------------------------------------------------------------------------------------------------- Source DF Adj SS Adj MS F-Value P-Value C2 2 67.46 33.73 7.36 0.002 Error 34 155.71 4.58 Total 36 223.17 S = 2.140 R-Sq = 30.23% R-Sq(adj) = 26.12% Level N Mean StDev 1 12 8.386 2.071 2 12 10.638 2.269 3 13 11.608 2.080 Pooled StDev = 2.140 Fisher Individual Tests for Differences of Means Difference of Levels Difference of Means 97.6667% CI T-Value Adjusted P-Value 2 - 1 2.252 (0.177, 4.327) ? ? 3 - 1 3.222 (1.187, 5.256) ? ? 3 - 2 0.970 (-1.065, 3.005) ? ? Simultaneous confidence level = 94.61% -------------------------------------------------------------------------------------------------- (a) Find a 93% Bonferonni confidence interval for μ3 − μ1. (enter your answer in the form a,b - numbers correct to 3 decimals) (b) Which pairs of means are significantly different (using the Bonferonni method at the 7% significance level)?

(A) 2 and 3 only (B) 1 and 2, 1 and 3 only (C) 1 and 3, 2 and 3 only (D) 1 and 2 only (E) 1 and 2, 2 and 3 only (F) none of them (G) all of them (H) 1 and 3 only

Answer 1

alata あ.huula,, n.. ,£ 覷.dn@ r N-A r3Y. 13 . 12 (3112士2.034 섦 . C 1, 196, 5-257 -1sc,525*

Co.140 그 오‘ o3491 C- o65, 3-oos) hini et CN5-A) (-'.ws, g.oo5) cr 0.117, 4. 317