How many pairwise comparisons would there be for an ANOVA with four groups?

An ANOVA procedure is used for data that was obtained from four  sample groups each comprised of four observations. The degrees of freedom for the critical value of F areGroup of answer choices4 and 153 and 123 and 153 and 16

An experiment involves 30 participants. From these, a group of 4 participants is to be tested under a special condition. How many groups of 4 participants are possible?

I obtained a significant F-value from the one-way ANOVA model “anova exercisehrs feedback”. I then conducted pairwise comparisons on all groups to detect the differences between groups. Comparing the testing results using Tukey’s test and Scheffé’s test, we can see that:Question 3Answera.The results of Tukey’s test and Scheffé’s test agreed with each otherb.Tukey’s test results showed that the praise group differed significantly from the other two groups on the “exercisehrs”, while Scheffé’s test results only showed a significant difference between the nothing and praise groupsc.Scheffé’s test results showed that the praise group differs significantly from the other two groups on the “exercisehrs”, while Tukey’s test results only showed a significant difference between the nothing and praise groupsd.Both test results showed a significant difference between the nothing and criticism groups

A two-factor ANOVA with two independent groups variables that each have three levels requires ____ groups of participants in total. 6 4 5 9

Using four methods to teach ANOVA, do these four samples differ enough from each other to reject the null hypothesis that type of instruction has no effect on mean test performance?Method to teach ANOVA Mean SD Nmethod 1 (single teacher) 4.85 0.360 34method 2 (co-teachers) 4.61 0.715 31method 3 (computer) 4.61 0.688 36method 4 (lab) 4.38 0.793 32Since we are comparing more than 2 groups, we will use ANOVA to test whether the data provide evidence that test score is related to teaching method.One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that this condition is met in this case? Yes, since 0.793 − 0.360 < 2. No, since 0.793/0.360 > 2 No, since the four sample standard deviations are not all equal. No, since the population standard deviations are not given, so we cannot check this condition.