Statistics

Statistics

24. To determine how exam scores change based on study time, it would be best to use which of the following? a. Cross tabulation and Chi-square b. Regression analysis

29. Choose the value that represents almost no linear relationship but slightly decreasing. a. −0.154 b. 0.825 c. −0.825 d. 0.154 30. Choose the value that represents almost no linear relationship but slightly increasing. a. −0.15 4 b. 0.825 c. −0.825 d. 0.154

c. Histogram d. Correlation

25. To determine how letter grades vary according to student gender, it would be best to use which of the following? a. Crosstabulation and Chi-square b. Regression analysis

c. Histogram d. Correlation

26. The strength of a linear relationship between two variables is indicated by what? a. Chi-square coefficient b. Pearson correlation coefficient c. Mode d. p-value 27. Choose the value that represents a strong increasing linear relationship. a. −0.154 b. 0.825 c. −0.825 d. 0.154 28. Choose the value that represents a strong decreasing linear relationship. a. −0.154 b. 0.825 c. −0.825 d. 0.154

31. The number of observations is represented by which symbol?

a. N b. Σ c. X d. Y

32. The regression equation is: a. ̂= ∑ − (∑ ) b. ̂ = + c. ̂ = ∑ −(∑ )(∑ ) (∑ 2 )−(∑ ) 2 d. ̂ = +

33. Categorical variables that have a natural arrangement or order are called: a. Nominal b. Scale

c. Ordinal d. Discrete

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