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## STAT200 WEEK 8 HOMEWORK

by: kimwood Notetaker

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# STAT200 WEEK 8 HOMEWORK

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STAT200 WEEK 8 HOMEWORK
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This 0 page Study Guide was uploaded by kimwood Notetaker on Friday November 6, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 16 views.

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Date Created: 11/06/15
Lane Chap 15 10 If an experiment is conducted with 5 conditions and 6 subjects in each condition what are dfn and dfe DFn 56 1 29 DFe29 5129 524 17 The following data are from a hypothetical study on the effects of age and time on scores on a test of reading comprehension Compute the analysis of variance summary table 12year olds 16year olds 30 minutes 66 74 68 71 59 67 72 82 46 76 60 minutes 69 95 61 92 69 95 73 98 61 94 Hoa there is no signi cant difference in the rows H1a there is signi cant difference in the rows Hob there is no signi cant difference in the columns H1b there is signi cant difference in the columns The analysis of variance summary table is shown below Anova TwoFactor Without Replication SUMMARY Count Sum Average Variance 30 minutes 2 140 70 32 2 139 695 45 2 126 63 32 2 154 77 50 2 122 61 450 60 minutes 2 164 82 338 2 153 765 4805 2 164 82 338 2 171 855 3125 2 155 775 5445 644888 12year olds 10 644 644 9 136266 16year olds 10 844 844 7 ANOVA Source of Variation SS o f MS F Pvaue F crit 136088 210446 014145 317889 Rows 12248 9 9 7 9 3 309278 000035 511735 Columns 2000 1 2000 4 1 5 646666 Error 582 9 7 Total 38068 19 For rows Since pvalue 0141459 is greater than alpha 005 I don39t reject H0 at 5 level of signi cance and conclude that there is no signi cant difference in the rows For columns Since pvalue 0000351 is less than alpha 005 l reject H0 at 5 level of signi cance and conclude that there is signi cant difference in the columns ADHD Treatment AT case study httponlinestatbookcom2casestudiesadhdhtm 28 AT The dataset ADHD Treatment has four scores per subject a Is the design betweensubjects or withinsubjects The design is withinsubjects b Create an ANOVA summary table Ho there is no signi cant difference between the means of the four groups H1 there is signi cant difference between the means of the four groups Anova Single Factor SUMMARY Avera Varan Groups Count Sum ge ce 12802 D0 24 954 3975 17 39666 83449 D15 24 952 67 28 44333 13857 D30 24 1064 33 97 44708 15178 D60 24 1073 33 08 ANOVA Source of P Variation SS o f MS F value F crit 55761 18587 14815 02247 27035 Between Groups 46 3 15 45 47 94 11542 12545 Within Groups 13 92 79 12099 Total 74 95 Since pvalue 0224747 which is greater than alpha 005 I don39t reject H0 at 5 level of signi cance and conclude that there is no signi cant difference between the means of the four groups lllowsky Chap13 69 A researcher wants to know if the mean times in minutes that people watch their favorite news station are the same Suppose that Table 1324 shows the results of a study CNN FOX Local 45 15 72 12 43 37 18 68 56 38 50 60 23 31 51 35 22 Assume that all distributions are normal the four population standard deviations are approximately the same and the data were collected independently and randomly Use a level of signi cance of 005 Ho there is no signi cance difference in the mean times in minutes of people watching their favorite news station H1 there is signi cance difference in the mean times in minutes of people watching their favorite news station Anova Single Factor SUMMARY Su Averag Varan Groups Count m e ce 17 CNN 6 1 285 1635 22 38166 38056 FOX 6 9 67 67 27 Local 5 6 552 1637 ANOVA Sourceof Variation SS o f MS F P vaue F crit Between 19679 98396 40814 00401 37388 Groups 25 2 27 62 33 92 Within 33751 24108 Groups 33 14 1 53430 Total 59 16 Since pvalue 004 which is less than alpha 005 l reject H0 at 5 level of signi cance and conclude that there is signi cance difference in the mean times in minutes of people watching their favorite news station

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