Question

01 the 9.75 Going to m pie the result. coing for it on fourth down in the NFL. Each week baches in the National Football League (NFL) face a decision during the game. On fourth down, should the team punt the ball or go for a first down? To aid in the decision-making process, statisticians at California State University, Northridge, developed a regression model for predicting the number of points scored (y) by a team that has a first down with a given number of yards (x) from the opposing goal line (Chance, Winter 2009). One of the models fit to data collected on five NFL teams from a recent season was the simple linear regression model, E(y) = Bo + B1x. The regression yielded the following results: û = 4.42-.048 x, r2 = .18. a. Give a practical interpretation of the coefficient of determination, r2. b. Compute the value of the coefficient of correlation, r, from the value of r2. Is the value of r positive or nega- tive? Why? of Marine

Answer 1

9 April Mo Tu We Th Fr Sa 1 2 3 4 5 6 8 9 10 11 12 13 15 16 17 18 19 20 22 23 24 25 26 27 29 30 pale:) 27/3/2020 U / 2014 2014 Ansel THURSDAY Given that ů = 4.42-00488 018- 0118 (9) 92 Drefore sents the pooportion of suplained Sample Ugaliability forom greggie Brion lime with total sqm.10. Ngoziability. ..: 181% of total uqoriability in y m the sumpa com be explained by the regression line... Col.fident of course cation 913 9912 = t 2018 = + 0.424 Byle ole gore poncefficient shaureu Negative G0.048) slole between X and y. 9= -0.424.