Session 10 Quizziz

Which of the following best describes the purpose of a one-way ANOVA?

• To compare the relationship between two categorical variables

• To assess the difference in means between exactly two groups

• A generalization of the independent t-test to K groups, comparing means across three or more groups

• To analyze the correlation between two continuous variables

Which test would you use to make the following comparisons?

All sessions vs. some sessions vs. control group, equal variance

• Dunnett

• Tukey

• Welch's, Games Howell

Which test would you use to make the following comparisons?

John Adams HS vs. Lincoln HS vs. Geo Wash HS, equal variance

• Dunnett

• Tukey

• Welch's, Games Howell

Which test would you use to make the following comparisons?

All sessions vs. some sessions vs. control group, unequal variance

• Dunnett

• Tukey

• Welch's, Games Howell

TRUE OR FALSE: The F-test of the ANOVA tells us that one pair of means differs and which pair.

• TRUE

• FALSE

TRUE OR FALSE: r is a measure of the tendency for one variable to increase or decrease as the other increases or decreases. 

• TRUE

• FALSE

Which of the following statements about the Pearson correlation coefficient (r) is true?

• It can only be used if both variables are measured in the same units of measurement

• It can determine if one variable causes change in another.

• It requires both variables to be measured at the interval or ratio level.

• It distinguishes between independent and dependent variables.