6. One of the most important uses of a regression line is; a. to determine if any x-values are outliers. b. To know the relation between the random variables. c. to determine if any y-values are...

Extracted text: 6. One of the most important uses of a regression line is; a. to determine if any x-values are outliers. b. To know the relation between the random variables. c. to determine if any y-values are outliers. d. to estimate the unknown parameters. e. to estimate the change in y for a one-unit change in x. 7. The estimated simple linear regression model represents: a. the strength of the relationship between x and y b. the expected x value when y is zero c. the expected y value when x is zero d. a population parameter. e. None of the above. 8. A chi-square test involves a set of frequencies called observed frequency and expected frequency. What are the observed frequencies? a. Hypothetical frequencies that would occur of the alternative hypothesis were true. b. Hypothetical frequencies that would occur if the null hypothesis were true. c. The actual frequencies that did occur in the given experiment. d. The long-run counts that would be expected if the observed counts are representative. e. All of the above. 9. What does the two-way ANOVA analysis examine? a. The relationship between more than one dependent and only one independent variable b. The relationship between one or more than one dependent and only one independent variable The relationship between one dependent and more than one independent variables d. The relationship between more than one independent variables. e. None of the above. C.