Safaa Dabagh

Module Quiz

Module 10: Analysis of Variance (ANOVA) - 15 Questions

Quiz Instructions

1

What is the primary purpose of ANOVA?

2

Why shouldn't we use multiple t-tests when comparing 5 groups?

3

The F-statistic in ANOVA is calculated as:

4

Given k = 4 groups and N = 48 total observations, what are dfbetween and dfwithin?

5

Which relationship is ALWAYS true in ANOVA?

6

Given SSB = 150, SSW = 250, dfbetween = 2, dfwithin = 27, calculate F.

7

An ANOVA yields F = 12.5 with p = 0.0002. What can we conclude?

8

When should post-hoc tests be conducted?

9

Tukey's HSD = 5.2. Group means are: x̄₁ = 42, x̄₂ = 48, x̄₃ = 45. Which groups differ significantly?

10

If comparing 6 groups with α = 0.05, what is the Bonferroni-adjusted α?

11

Which is NOT an assumption of one-way ANOVA?

12

Three groups have variances: s₁² = 10, s₂² = 15, s₃² = 22. Is equal variance reasonable?

13

What is the appropriate test for comparing median incomes across 4 cities when data is highly skewed?

14

ANOVA is most robust to violations of normality when:

15

A study compares stress levels of 40 employees at three time points (morning, afternoon, evening). Which test is appropriate?

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