(d) Turns negative 15. (5 points) Suppose that a man has approximately the mean of weight. What would be the probability of having higher weight from the minimum? (a) 0 (b) 0.497 (c) 0.001 (d) 0.998 16. (5 points) Correlation analysis is used to determine the: (a) predicted value of y for a given value of x. (b) forecast value of a particular dependent variable. (c) strength of the relationship between x and y. (d) least squares estimates of the regression parameters. 17. (5 points) When you generate a confidence interval for the mean of a sample which is normal distributed, which one is a must? (a) Population median should be known. (b) Population range should be known. (c) Sample mean should be known. (d) Population variance should be known