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10. What is the difference between data measured on a ratio scale,…
10. What is the difference between data measured on a ratio scale, and data measured on an interval scale?
A. A ratio scale puts scores into categories, while an interval scale measures on a continuous scale.
B. A ratio scale has equal intervals between the points on the scale, whereas an interval scale does not.
C. An interval scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured.
D. A ratio scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured.
11. What type of scale has the greatest limitations on statistical analysis?
A. interval
B. nominal
C. ordinal
D. ratio
12. Brian wants to compare the mean test scores in 1 class to the mean test scores in another class. Which test of statistical significance should Brian use?
A. Pearson r
B. an independent t test
C. a correlated t test
D. a point-biserial correlation
13. Jack wants to investigate the mean differences between adolescents, young adults, middle-aged adults, and older adults on a quantitative measure of life satisfaction. Which of the following is the more appropriate test for him to use?
A. Chi-square
B. Independent t-test
C. One-way between-groups ANOVA
D. One-way within-groups ANOVA
14. A failure to reject the null hypothesis means that:
A. A relationship between the variables of interest probably exists.
B. There is no evidence that a relationship between the variables of interest exists.
C. The alternative hypothesis is false
D. A Type II error has been made
15. The p value associated with a statistical test indicates statistical significance while the associated effect size indicates:
A. amount of bias
B. effectiveness of the statistics
C. practical importance
D. statistical importance
16. Rejecting the null hypothesis indicates that:
A. A relationship probably exists between the variables of interest.
B. no relationship exists between the variables of interest.
C. the alternative hypothesis is false.
D. that a Type I error has occurred.
17. If my null hypothesis were “there is no difference in anxiety levels between postpartum mothers with their first child and postpartum mothers with their second child,” what would my research (alternative) hypothesis be in relation to the anxiety levels of these two groups?
A. There is a difference in the anxiety levels of these two groups.
B. First-time mothers have higher anxiety levels than second-time mothers.
C. Both (a) and (b) are possible research hypotheses..
D. Neither (a) nor (b) are possible research hypotheses.
