please answer and make solution

II. Written Work. Encircle the letter of the best answer. (10 points) 1. The correlation coefficient is used to determine: a. a specific value of the y-variable given a specific value of the x-variable b. a specific value of the x-variable given a specific value of the y-variable C. the strength of the relationship between the x and y variables d. none of these 2. If there is a very strong correlation between two variables, then the correlation coefficient must be. a. any value larger than 1 b. much smaller than 0, if the correlation is negative C. much larger than 0, regardless of whether the correlation is negative or positive d. None of these alternatives is correct. 3. The relationship between number of beers consumed (x) and blood alcohol content (y) was studied in 16 male college students by using least squares regression. The following regression equation was obtained from this study: y= -0.0127 + 0.0180x. The equation implies that: a. a. each beer consumed increases blood alcohol by 1.27% b. on average it takes 1.8 beers to increase blood alcohol content by 1% C. each beer consumed increases blood alcohol by an average of amount of 1.8% d. each beer consumed increases blood alcohol by exactly 0.018 4. In regression analysis, the variable that is being predicted is the a. dependent variable C. intervening variable b. independent variable d. is usually x Page 1 of 4 5. If the coefficient of determination is a positive value, then the regression equation. a. must have a positive slope C. could have either a positive or a negative slope b. must have a negative slope d. must have a positive y intercept 6. If two variables, x and y, have a very strong linear relationship, then a. there is evidence that x causes a change in y b. there is evidence that y causes a change in x C. there might not be any causal relationship between x and y d. None of these alternatives is correct. 7. In regression analysis, if the independent variable is measured in kilograms, the dependent variable a. must also be in kilograms C. cannot be in kilograms b. must be in some unit of weight d. can be any units 8. If the correlation coefficient is a positive value, then the slope of the regression line a. must also be positive C. can be zero b. can be either negative or positive d. cannot be zero 9. Which scatterplot describe a perfect negative linear relationship? a b. C. d. 10. It is a diagram that is used to show the degree and pattern of relationship between the two (2) sets of data. a. Histogram b. Line graph C. Normal curve d. Scatter plot