Question

Consider the following ANOVA summary table: ANOVA Summary Table SS df MS Source F 9 7.3 Group (Between) Error (Within) Total 2400 30 The researcher was comparing 9 groups and found there were no significant differences between the groups. o The researcher was comparing 8 groups and found there were significant differences between the groups. O None of the choices give a correct description of study design and results. o The researcher was comparing 9 groups and found there were significant differences between the groups.

Answer 1

- Consider the following ANOVA summary table: SS df ms Source Group CBetween) Error (within) 7.3 30 Total 2400 corrects description The correct answer is option @ None of the choices give Study results . design and Reason We know that the for factor group is, 1 the degrees of freedom df - number of groups In this case, df = number of roups - 1 g number of groups -1 number of groups 9 +1 number of groups = 10 the reasearcher want to comparing groups. こ that means,

Consider the following ANOVA table, ms F 1000 Source ss df Group 2000 2 (Between) Error (within) Tokal 3000 20 table summary first Complete above ANOVA We know that, SS group Cruy First, Calculate the Semor SS f SS error Stotal こ + SS 7 . Stotal 3000 2000 + Serror T Serror 3000 - 2000 - looo - Serror こ 1000 The of freedom for Error is, degrees df total + df af group emor 20 2 + error ofessor 20 2 18 afensor = 18 We know that the ralue of mSerror is Ms Corot Sseoror dferoor msensor looo msenoor 11 1ooo

The value is, Lobo f ms group Ms. error 100 X () 18 Todo = 18 l z 8 I The value of o should be 18. The correct answer is option A 0 F = 18