practice problems - two way ANOVAS

# practice problems - two way ANOVAS - Two-way ANOVAs...

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Unformatted text preview: Two-way ANOVAs ! . Assuming that any visible difference is a signiﬁcant difference. examine the follgu ing graphs and determine: f i/a. Is there :1 main effect of variable A? Ni) is there a main effect of variable 8‘? N L/C. 15' [here an interaction between A and B? ‘/ d. Is there a simple main effect of A at h2? ‘1'»? . / - . ~ i L. Is there a Simple mam effect 01 B at :11? q . c .r 7’4, V J 1". ‘ ’i i ‘ 1. i—O—A1 ‘ l -A2 3 -‘ r”! \\V{ - U/ \ . if f . i. i 5‘11 .. —+—-A1 .I I 3 -A2 I K _, _ K I‘I '7' \/’ 3. (Tune 3 iil1t‘ grnph nl' at 3\2 tlt‘sign in which there is no signiﬁcant main ci'l'crt of A. but lhcrc it: a signiﬁcant main cl'l'ccl n1. H and a signiﬁt'unl interaction. 3. (‘runlc a Iinc graph ul' ;1 l\\'U-\\i|_\ ANOVA with a signiﬁcant interaction. :1 signiﬁcant main cl'l'cct ul' huth .-’\ and [3.21m] nu significant simple main «slit-cut at" A ill hl. —l. i am interested in eialualing whether student.» l'mm different parts ul' lhe euunlr)‘ have dill'erent altitudes; lmx'unk winter weather. l t‘\ aluale .x‘ludenlu from 6 different reginnx (Northeast. Southeast. (lreat l’laina. Snuthnesh West (132151. and Outside the US) on a ueale ranging from I {hate winter n‘c'urher} lo It) (/01? Miller weather). Furthermore. I'm eurinux it the amount of lime at Bales all'eels aludenls‘ winter alliludes. so 1 also evaluate Class; year ll‘irut—ycai; wphumnrc‘ juninr. senior) in m}- analyslis. ‘l'here were equal numbers of parlieipanls in each condition. (‘omplele the ANOVA lahle and answer the lhllmving quesliunx. What type of test was conducted? 1' What is the dependent variable?‘ ‘ What are the independent variables? What is/are the appropriate Feritieal valuets) far this analysis? (1 .‘se (1 = .05. Round _\nur ill 1:: the closest dl‘ \ alue in the table to gel the critical value.) How many sophomores participated in this study? 1 Is it appropriate to do simple main effects tests? Why or why not? Interpret this analysis in APA style. Examine this means matrix and answrr the fniiuwing questions. Assume that there are an equal number of participants in each conditinn. _ gm 7 i312 7 Ba 1 '__ﬂ_ _L_ JEINL L A2_ L _ _3 _771 L 2 _} 52:, To (It-[ermine if thon- is a main emit-[01' A. what arc the values of the means that need to be compared? - -, . . ~ Sh. Assuming that you find a niain effect of A. describe the post-nods) that should he conducted. F I ‘ ' ' Sc. What is [he valueof AB“? id. What is the grand mean? ...
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