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QuizCh12Solutions

# QuizCh12Solutions - Math 350 — Quiz Chapter 12 — ANOVA...

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Unformatted text preview: Math 350 — Quiz Chapter 12 — ANOVA Printed Name: lef E, Calculators are allowed on this quiz...neighbors are not! Show work for credit. A clinical psychologist wished to compare three methods for reducing hostility levels in university students. A certain test (HLT) was used to measure the degree of hostility. A high score on the test indicated great hostility. Eleven students obtaining high and nearly equal scores were used in the experiment. Four were selected at random from among the 11 problem cases and treated with method 1. Four of the remaining 7 were selected at random and- treated with method 2, and the remaining were treated with method 3. All treatments were continued for a one-semester period. Each student was given the HLT test at the end of the semester, with results and output shown below. Assume that the distribution for HLT scores for the three methods are normally distributed with equal population variance. Test Scores for Method 1 Test Scores for Method 2 Test Scores for Method 3 80 92 87 83 7O 81 78 74 63 76 7O State the Hypotheses {in mm M; m an H1 ‘ﬂm m at W W egg-dual)” ‘Iﬂ, no W+Ld U £451“le ”/ Laﬂ‘iiij (me m a d~1~ Q (fa-i Oi ﬁJU’x‘jj I fl.“ F3? 5'24 (214(th Wide: New wank coy/,..,_4(j‘ ............................................................................................................................ Calculate the p—Value. Z 26, 06% Q0 __ ____,._-w-\- '1 F: 7,71Llcliﬁ.---l : “TS—gay (Wedge; ‘ hi 77HWC/J '2,“ :0,0(319177,_- ............................................................................................................................ k REJECT Ho Decision - FAIL TO REJECT Ho - ACCEPT Ho Conclusion. 1" 0‘30ou UNA (Cl [Qt-J“ lulu («O/éddy 1%“ (I J 0’ war it wfgtrﬁd‘b‘ Mi ﬁffuwh.’ :8 all (read two Milwli Dr. Emmert Summer 2011 I of I Points Earned l: of 10 ...
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