(1) Calculate the average score and variance of math and physics scores; . x = 100，。 Y =65, the variance of mathematics score is 750, and the variance of physics score is 306.25; (4 points) (2) Find the value of correlation coefficient R and judge the strength of correlation; R = 6675 ≈ 0.94 > 0.75, with strong correlation; (8 points) (3) Find the linear regression linear equation of math score X and physics score Y, and use math score 1 10 to predict students' physics scores. Y = 0.6x+5, and the students whose math scores are predicted to be 1 10 will get 7 1. ( 10