# 16STAT 301 March9 - STAT301 March9,2015 Homework#7...

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STAT 301March 9, 2015Homework #7- Comparing two means Due Tomorrow nightNOLab FridayGradient #2 Text Writing due Monday 2/23
Comparison of Two Means exampleAn experiment is conducted to determine whether intensive tutoring (covering a great deal of material in a fixed amount of time) is more effective than paced tutoring (covering less material in a longer amount of time). Two randomly chosen groups are tutored separately and then administered proficiency tests. Use a significance level of α < 0.05.Let group 1 be the population of the intensive tutoring group and group 2 be the population for the paced tutoring group. The summary statistics:The Hypotheses --H0: μ 1= μ 2H0: μ 1– μ 2= 0 H0: μ Int= μ Pacedor orH a: μ 1> μ 2 H a: μ 1– μ 2> 0 H a: μ Int> μ Paced The test statistic: Draw picture01.166So, find P(t > 1.166) with 9 df
Table D
Comparison of Two Means exampleAn experiment is conducted to determine whether intensive tutoring (covering a great deal of material in a fixed amount of time) is more effective than paced tutoring (covering less material in a longer amount of time). Two randomly chosen groups are tutored separately and then administered proficiency tests. Use a significance level of α < 0.05.Let group 1 be the population of the intensive tutoring group and group 2 be the population for the paced tutoring group. The summary statistics:null hypothesis: H0: μ 1= μ 2H0: μ 1– μ 2= 0 oralternative hypothesis: H a: μ 1> μ 2 H a: μ 1– μ 2> 0 The test statistic: With df = 9, .1 < P(t>1.166) < .15 Fail to reject Ho.There is no strong evidence to suggest that the population of students using intense tutoring learn more than the population of students using paced tutoring.Draw picture0
One-Way ANOVA: One-Way Analysis of Variance   (Chpt. 12)© 2011 W.H. Freeman and Company
6IntroductionThe two sample t procedures of Chapter 7 compared the means of two populations or the mean responses to two treatments in a comparitive experiment.