Hypothesis Testing (Three or More Population Means) MCQ
Hypothesis Testing (Three or More Population Means)
1. Is within-group variance the amount of diversity that exists among the people or objects in a single group or class. This is a measure of random fluctuation, or error?
Answer
Correct Answer:
True
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2. _____ is known as a widely used post hoc test used in ANOVA when the null is rejected as a means of determining the number and location of differences between groups.
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3. _____ is defined as analyses conducted when the null is rejected in ANOVA in order to determine the number and location of differences between groups.
Answer
Correct Answer:
Post hoc tests
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4. _____ is a measure of association used in ANOVA when the null has been rejected in order to assess the magnitude of the relationship between the indepen- dent and dependent variables. This measure shows the proportion of the total variability in the sample that is attributable to between-group differences.
Answer
Correct Answer:
Omega squared
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5. Is familywise error the increase in the likelihood of a Type I error (i.e., erroneous rejection of a true null hypothesis) that results from running repeated statistical tests on a single sample?
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Correct Answer:
True
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6. _____ is known as the statistic used in ANOVA; a ratio of the amount of between-group variance present in a sample relative to the amount of within-group variance.
Answer
Correct Answer:
F statistic
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7. _____ is defined as the sampling distribution for ANOVA. The distribution is bounded at zero on the left and extends to positive infinity; all values in the F distribution are positive.
Answer
Correct Answer:
F distribution
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8. _____ is a widely used and relatively conservative post hoc test used in ANOVA when the null is rejected as a means of determining the number and location of differences between groups.
Answer
Correct Answer:
Bonferroni
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9. Is between-group variance the extent to which groups or classes in a sample are similar to or different from one another. This is a measure of true group effect, or a relationship between the independent and dependent variables?
Answer
Correct Answer:
True
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10. _____ is known as the analytic technique appropriate when an independent variable is categorical with three or more classes and a dependent variable is continuous.
Answer
Correct Answer:
Analysis of variance (ANOVA)
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11. Which of the following statements describes the only conclusion that can be made from an ANOVA analysis?
Answer
Correct Answer:
That one group mean is different from another.
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12. Which of the following statements accurately describes the purpose of an ANOVA analysis?
Answer
Correct Answer:
It combines means and variances to test for significant differences.
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13. How is within-group degrees of freedom calculated?
Answer
Correct Answer:
DFW = N – K
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14. What is being compared in a Tukey’s HSD test?
Answer
Correct Answer:
Each group’s mean to each other group’s mean
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15. Which of the following statements describes how the obtained F value is calculated?
Answer
Correct Answer:
Dividing MSB by MSW
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16. Which of the following specifies the distribution that is used with an ANOVA test statistic?
Answer
Correct Answer:
The F distribution
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17. Which of the following provides a definition for within-group variance?
Answer
Correct Answer:
The amount of diversity that exists within a single group
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18. In an ANOVA test, the dependent variable must be in which of the following forms?
Answer
Correct Answer:
Continuous
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19. Which of the following is an example of a measure of association used with ANOVA analysis?
Answer
Correct Answer:
Omega square
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20. Which of the following is an example of a post hoc test used with ANOVA analysis?
Answer
Correct Answer:
Bonferroni
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21. Tukey’s HSD test is a post hoc test commonly used with ANOVA analysis.
Answer
Correct Answer:
True
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22. Degrees of freedom are included in the calculation of an ANOVA test.
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Correct Answer:
True
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23. Between and within group variance are analyzed in an ANOVA test.
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Correct Answer:
True
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24. Familywise error increases the likelihood of a Type I error.
Answer
Correct Answer:
True
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25. The ANOVA test is used when the independent variable has two or more classes.
Answer
Correct Answer:
False
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