It is a conservative test method by pooling insignificant SS_interaction with SS
ID: 3250328 • Letter: I
Question
It is a conservative test method by pooling insignificant SS_interaction with SS in 2-way ANOVA 2. It is necessary to perform both Levene and Tukey tests m one-way ANOVA 3. Plot of treatment variances can be used to identify interaction n two-way ANOVA 4. Wilcoxon rank sum test can be used in single and multiple groups of sample 5. The ranking scheme in nonparametric analysis typically based on the absolute value 6. One-way ANOVA with k = 5, n = 4, MSE = 50 and alpha = 0.05, the C.R. for Tukey's test is _____ 7. One-way ANOVA with k = 5, n = 4, MSE = 50 and alpha = 0.05, the C.R. for Bonferroni's test is _____ 8. List any design factor in the paper helicopter experiment _____ 9. In a DOE of two factors each has 3 levels and 4 data per cell, d.f for SST is _____ the d.f. of Interaction is _____, and the d.f. of SSE is _____ Use nonparametric ranking method to assign ranks for the follow data: 85, 80, -88, 72, -85. _____Explanation / Answer
The first statement is True:
It is a conservative apporach to add the insignificant SS to the error SS value , because though it is insignifcant but it surely matters in the final answer
.
The seocnd statement is False:
levene and tuckey test are done where there are multiple factors in the model , and we wish to know the individual strength of each factors relation with the response variable. In case of One way ANOVA there is only one varaible. That is why levene and tuckey test do not apply to it
.
The third statement is false;
By plotting the variables directly against the response variable or other variables, we can trace out if the interaction is important or not . Separately exclusively we cannot plot the varainces and decide upon the "interaction level"
.
The fourth statement is false:
This statement is also incorrect. Wilcoxon test can be performed only for comparing two groups or pairs to be specific. It is a paired non parameteric test
.
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