sapie 11.4 are 88.0 and -839 e means corresponding to 6 110in Exercise 1 1. are
ID: 3309233 • Letter: S
Question
sapie 11.4 are 88.0 and -839 e means corresponding to 6 110in Exercise 1 1. are 88 and 2.90% confidence interval foru, 2 :839, Find a 90% confidence interval for the diff (HI and x2 = 839 Mete 11.7 These data are observ 7 using a rand ple 1 Sample 2 Sample 3 letely randomized design nts omited n analysis of variance for this expe b. Do the data provide sufficient evidence to in methods after treatment 11.11 Hostility,continued Refer to 11.10. Let , ad , respectively scores at the end of the semester for the popu extremely hostile students who were treated to the te apter: ficant denote the that semester by method A and method B a. Find a 95% confidence interval frPc a. Calculate CM and Total Ss b. Calculate SST and MST. c. Calculate SSE and MSE d. Construct an ANOVA table for the data. e State the null and alternative hypotheses for an b, Find a95% confidence interval for c. Find a 95% confidence interval for gative sum d. Is it correct to claim that the confidence found in parts a, b, and c are jointly val degrees of 11.12 Assembling Electronic conducted to of squares analysis of variance F test. EX112 An experiment was approach to determine whether effectiveness of three training programs there is a difference in the three population means. n training assemblers of a piece of elect ment. Fifteen employees were randomly 11.8 Refer to Exercise 11.7 and data set EX1 107.each, to the three programs. After comp Do the data provide sufficient evidence to indicate a courses, each person was required to as pieces of the equipment, and tea era required to complete the assembly wa Several of the employees resigned du the program; the remainder were eval the data shown in the accompanying MINITAB printout to answer the quest difference between 2 and 3? Test using the t test of Section 10.4 with -0.05. 11.9 Refer to Exercise 11.7 and data set EX1107. a. Find a 90% confidence interval for 1. ference Average Assembly T Training Program of four a 90% confidence interval for the difference ns 59 64 7 52 58 54 58 65 71 mples in their rt, ing Hostility A clinical psychologist a. Do the data providesuffien thods for reducing hostility a difference in mean assembly and interpret its value. d APPLICATIONS trained by the three programs? nterv wishad t ducing Hostility experiExplanation / Answer
Sol:
Null hypothesis:
Ho:2=3
Alternative Hypothesis:
H1:2 3
two tall t test
t=3.38
p=0.012
p<0.05
Reject NUll hypothesis
Accpt alternatiev Hypothesis
there is sufficient evidecne at 5% l;evel of significance to support the claim that the means are different.
t-Test: Two-Sample Assuming Unequal Variances sample2 sample3 Mean 3.8 1.25 Variance 1.7 0.916667 Observations 5 4 Hypothesized Mean Difference 0 df 7 t Stat 3.380029 P(T<=t) one-tail 0.005879 t Critical one-tail 1.894579 P(T<=t) two-tail 0.011758 t Critical two-tail 2.364624Related Questions
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