Under what circumstances is the experiment wise alpha level a concern? Whenever
ID: 3244243 • Letter: U
Question
Under what circumstances is the experiment wise alpha level a concern? Whenever an experiment involves more than one hypothesis test. Whenever you do an analysis of variance. Whenever the alpha level is greater then.05. Whenever an experiment compares exactly two treatments. In general the distribution of F-ratios is symmetrical with a mean equal to df_between positively skewed with all values greater than or equal to zero symmetrical with a mean of zero negatively skewed with all values greater than or equal to zero If a two-factor analysis of variance produces a statistically significant interaction, then you can conclude that __________. the significance of the main effects is not related to the significance of the interaction neither the main effect for factor A nor the main effect for factor B is significant either the main effect for factor A or the main effect for factor B is also significant both the main effect for factor A and the main effect for factor B are significant A repeated-measures study uses a sample of n = 20 participants to evaluate the mean differences among three treatment conditions. In the analysis of variance for this study, what is the values for df_between treatments? 19 2 59 57 Treatment 1 Treatment 2 Treatment 3 n = 5 n = 5 n = 5 T = 5 T= 10 T = 15 SS = 25 SS = 20 SS = 15 In a one-way analysis of variance for these data, the variability between treatments has degree of freedom equal to 12 14 2 3Explanation / Answer
1. when an experiment involves more than one hypothesis test
2. Positively skewed with all values greater than or equal to zero
3. The significance of main effects is not related to the significance of interaction effect
4. 3-1= 2 df
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