Question

Question 1 (1 point) Where t-tests only allow the comparison of 2 groups at a time, ANOVA will analyze the variance among three or more groups. Question 1 options: a) True b) False Question 2 (1 point) There is no effect on error rate whether we run one ANOVA with post hoc tests or multiple t-tests. Question 2 options: a) True b) False Question 3 (1 point) The F-Ratio is calculated by taking the ratio of variance between two groups and variance within groups (error variance). An F-Ratio of 1 or greater is more likely to yield differences among the groups than an F-Ratio less than 1. Question 3 options: a) True b) False Question 4 (1 point) If we have a significant ANOVA, we need to run post hoc tests to find which groups are significantly different from which other groups. Question 4 options: a) True b) False Question 5 (1 point) The critical value for an F-Ratio with df 4, 8, α = 0.05 is ___________. Question 5 options: a) 3.84 b) 8.84 c) 4.07 d) 7.59

Answer 1

Ans.

(1). t test use only to test the significance of the difference between two measns of independent two groups. While the ANOVA is used for testing the equality of means of three or more than three groups at a time. In ANOVA we estimate the variance of each independent factors. False

(2).False

(3). The F-Ratio is calculated by taking the ratio of variance of each independent factor with the variance within group.​true

(4).true

(5). The critical value of F ratio with (4, 8) df at alpha= 0.05 is

(a). 3.84

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