Question

Thus Question: 6 pts 2 of 30 (1 complete) This Qu The data below represent the number of days absent, x, and the final grade, y, for a sample of college students at a large university Complete pe below. No. of absences, * 0 1 2 3 4 5 6 7 8 9 Final grade, y 88.1 852 822 796 76.6 72.1 62.5 66.9 63.9 60.9 (a) Find the least squares regression line treating the number of absences, x, as the explanatory variable and the final grade, y, as the response 9 = x+( (Round to three decimal places as needed.) (b) Interpret the slope and y-intercept, if appropriate Interpret the slope Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) days. O A. For every day absent, the final grade falls by on average OB. For a final score of zero, the number of days absent is predicted to be O C. For zero days absent, the final score is predicted to be Click to select your answer(s)

Answer 1

@ n= 10, EX = 45, EX? = 285 sy = 738, E xy = 3057.9 n Exy – Exy slope, ß = 2 nEx-(3x) _10(3057.9) — 45 (738) 101285) -(45) ? = -3.18909 ~ -3.189 y-intercept, Bo = E , = 738 - (-3.18909) 46 = 88.15090 ř 88.151 → = -3.189]x +88.151| option (A) For every day absent, the final grade by 13.189], on average falls