Question 13 The data below is 14 observations of Math SAT scores (x) and scores on Math placement test (y). Calculate the linear correlation coefficient, T. Enter your answers to two decimal places. X Y 400 453 440 485 530 611 550 564 420 384 590 573 560 596 600 656 500 427 410 396 580 505 430 455 480 483 450 377 urse 1 tton Submit Question 50 F ~ 94 5% O mort sc delet 112 10 DDI 144 + 6 0 14 & O 5 O P R T KScore: 1/25 1/25 answered 1hr55mins X Progress sa Question 14 Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y = 30.98z + 57.95 and the T = 0.777. What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage accurate to one decimal place. Submit Question 50OF A O hp 112 X prt sc 10 19 141 & % 5 6 P R T Y U K F G HScore: 1/25 1/25 answered Question 12 Based on the data shown below, calculate the correlation coefficient (to three decimal places). This is th 'r' value you get when you do the regression. 12.2 2 13.7 3 17.4 4 21.4 5 24.2 6 26.9 7 27.6 Submit Question 50OF O nsort sc DDI 19 10 144 7 & % 8 5 6 P