Question

need help solving, n explainations prefered

uppose that a random sample of 900 20-year-old men is selected from a population and that these men's height and welight are recorded. A regression of weight on height yields. Weight -100.50 +424 x Height, R-0.50, SER=10.25 where Weight and Helight are measured in pounds and inches, respectively. Note: 1 pound kg, and 1 inch 2.54 cm. Awer Questions 20-23 0.453592 20. What is the region prediction for someone who is T2 inch tall? (a) 154.16 pounds 201.78 pounds (d) 297.25 pounds 21. A men has a late growth spurt of 15 in over the course of a year. What is the regression's prediction for the Increase in this man's weight? () 8.45 pounds (W) 9.36 pounds (c) 15.62 pounds (d) 4.65 pounds 22. What is the region's interceptatione in kilograma? (a) -85.265 pounds ( 5.586 pounds 1-45.472 pounds (d) -14.265 pounds ion's slopestimate in kilogram/em? 23. What is the reg Kojast (by 1.2564 (c) 5.3625 (d) 3.6587 21. In the simple linear regression model, the regression slopes () indicates by how many percent Y increases, given a one percent increase in X th) when multiplied with the explanatory variable will give you the predicted Y. Condicates by how many units Y increase given a one unit increase in X (d) represents the elasticity of Yon X

Answer 1

Weight = -100.50 +4.24 Height (in inches) 2 an linch - 2.54 when height = 72 inch 14 wegits -100.50 +4.24 (72) - 204.78 2 ③ @wezit – DW_ 4.24 - a neght oth = " ow= 4.24 BH = 4.24 (15) - 6:36 pounds Intercept = -100.50 pounds I pounda 0.453592 kg Mes loo so panda 100.0 10.453592) =-45.585996 kg U slopes 4.24 height( c he) /18 nich has 4.24 kg charged ble of 2.54 cm. 1.92323 ponds bleef 2.54cm 2,9 glope colffen = 1.92323 -0.52 by C