For a PTH level of x = 100 ng/l with the standard intact test, what is the predicted PTH level with the turbo test? 0 97 ng/l 0 103.64 ng/l 0 112.36 ngfl O Cannot be predicted accurately because it would be extrapolation Question 13 (1 point) Roughly what percent of the variation in turbo test results can be explained by this regression model? Q It is not possible to answer with the information provided. Question 14 (1 point) What is the slope of the regression line? Question 15 (1 point) For a PTH level of x = 1000 ng/l with the standard intact test, what is the predicted PTH level with the turbo test? 0 970 ng/l 0 1036.4 ng/l 0 1075.64 ngn 0 Cannot be predicted accurately because it would be extrapolation Question 16 (1 point) Suppose we t the least-squares regression line to a set of data. What do we call points with unusually large values of the residuals? O Residuals O Slope O Outliers O Correlated Question 17 (1 point) Event A has probability 0.4. Event B has probability 0.5. If A and B are disjoint, what is the probability that both events occur