55 57 596d 63 p 203 205 3 5 6 11cd 13d 1 A study was done on the relationship between high school grade point average GPA and scores on the SAT The following 8 scores were from a random sample of students taking the exam GPA SAT 3 2 725 3 8 752 3 9 745 3 3 680 b Interpret the residual that you calculated in part a B 3 6 700 The least squares regression line for predicting SAT from GPA was calculated to be y 154 158x a Calculate the residual for the student who had a GPA of 3 2 C P value 0 1974 2 8 562 2 Which residual plot below indicates that the linear model is appropriate Justify your answer A D friend 2 9 595 Dependent variable is Other R squared 87 3 s 3 853 with 11 2 9 degrees of freedom Variable Coefficient SE Coeff t ratio Intercept 306780 1 39 7 85 0 0001 2204 Marijuana 0 615003 0 0784 b Identify and interpret the coefficient of determination 3 5 730 3 The European School Study Project on Alcohol and Other Drugs published in 1995 investigated the use of marijuana and other drugs Data from 11 countries are summarized in the following scatterplot and regression analysis They show the association between the percentage of a country s ninth graders who report having smoked marijuana and who have used other drugs such as LSD amphetamines and cocaine c Identify and interpret the standard deviation of the residuals s a Write the equation of the least squares regression line