1) F T F F T F F T T T F T
2-7) C; C; D; D; A; A&C
8) A, B, A, C, C, B, 4, 36 
9.a) y.hat = 178.32 + 1.81X1 + 3.32X2 - 21.18X3 + 0.32X4
9.b)
Source____DF_______SS_________MS_______F__P-value
Model______4___176777___44191.25___479.3___<0.005 (that is the most accurate p-value from the table)
Error_____21_____1937______92.2
Total_____25___178714

9.c) 3.318 +/- 2.08*sqrt(0.0002876*92.2) = 3.318 +/- 0.339 = [2.979, 3.657]
9.d) Yes, it is significantly different from 2, because 2.0 is not within the CI.
9.e) NO multicollinearity problem. Because VIFs < 5 and condition index < 30.
9.f) 44.39655
9.g) Yes, 0.7678 (p-value from Shapiro-Wilk test)
9.h) SSReg/SSTOTAL=176777/178714=0.989
9.i) [154.672, 197.725] from SAS output on page 7 (lclindiv and uclindiv for the last obs.)
9.j) The 8th and 21st observations are influential observations, because of their DFFITS values 
     (|DFFITS|> 1) and Cook's distance (>4/n=4/26=0.154).