One-Way ANOVA & Kruskal Wallis

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DR WARID MIHAT

Malasia

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One-Way ANOVA & Kruskal Wallis


One-Way ANOVA & Kruskal WallisVersión en línea Quiz on One-Way ANOVA and Kruskal Wallis por DR WARID MIHAT 1 What is the primary difference between the One-Way ANOVA and the Kruskal-Wallis test regarding the data they analyze? a ANOVA requires two groups, while Kruskal-Wallis requires three or more. b ANOVA tests for differences in variance, while Kruskal-Wallis tests for differences in means. c ANOVA is used for ordinal data, while Kruskal-Wallis is used for metric data. d ANOVA compares group means, while Kruskal-Wallis compares group rank sums. 2 Which assumption must be met to validly perform a One-Way ANOVA? a The groups must have different variances from one another. b The dependent variable must be nominal or ordinal. c The measurements across different groups should be dependent on one another. d The data within each group must be normally distributed. 3 In the context of Kruskal-Wallis, what happens if the groups have no influence on the dependent variable? a The mean of each group will be exactly equal to the median. b The variance within the groups will reach zero. c The ranks should be distributed purely randomly across the groups. d The H statistic will be significantly larger than the critical value. 4 How is the F statistic in an ANOVA calculated? a By dividing the variance between groups by the variance within groups. b By subtracting the mean squares within groups from the mean squares between groups. c By multiplying the sum of squares by the degrees of freedom. d By dividing the total mean by the sum of all individual data points. 5 If an ANOVA yields a significant result, why is a post-hoc test usually necessary? a To calculate the statistic for non-parametric data. b To check if the data was actually normally distributed. c ANOVA only indicates that at least one group is different, but not which specific groups. d Because ANOVA results are only valid if confirmed by a second, different test 6 Which distribution is used to determine the critical value for the Kruskal-Wallis H statistic? a The Student's T distribution. b The Binomial distribution. c The F distribution. d The chi-square distribution. 7 In an ANOVA with 3 groups and a total of 24 subjects, what are the degrees of freedom (df) between the groups? a 23 b 2 c 24 d 3 8 Which test is recommended if the assumption of 'homogeneity of variance' is violated in a One-Way ANOVA? a Levene's test b Kruskal-Wallis test c Welch ANOVA d Post-hoc Tukey test 9 When calculating the Kruskal-Wallis test, how is a 'rank' assigned to data points? a All values are sorted from smallest to largest, and assigned a number based on their position. b Ranks are assigned only to the mean values of each group. c Each group is ranked separately from 1 to . d Ranks are assigned based on how far each value is from the group mean 10 What is my name? a Warid Mihat b Warid Mihad c Warit Mihat d Warit Mihad

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One-Way ANOVA & Kruskal Wallis

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One-Way ANOVA & Kruskal WallisVersión en línea

por DR WARID MIHAT

What is the primary difference between the One-Way ANOVA and the Kruskal-Wallis test regarding the data they analyze?

Which assumption must be met to validly perform a One-Way ANOVA?

In the context of Kruskal-Wallis, what happens if the groups have no influence on the dependent variable?

How is the F statistic in an ANOVA calculated?

If an ANOVA yields a significant result, why is a post-hoc test usually necessary?

Which distribution is used to determine the critical value for the Kruskal-Wallis H statistic?

In an ANOVA with 3 groups and a total of 24 subjects, what are the degrees of freedom (df) between the groups?

Which test is recommended if the assumption of 'homogeneity of variance' is violated in a One-Way ANOVA?

When calculating the Kruskal-Wallis test, how is a 'rank' assigned to data points?

What is my name?