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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.

Answer

Correct Answer: Tukey’s honest significant difference

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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?

Answer

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.

Answer

Correct Answer: True

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23. Between and within group variance are analyzed in an ANOVA test.

Answer

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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