= a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.)Answers
c)
xbar =8.80
ybar =13.93
yhat =-34.037+5.451*x
e)
r2 =0.989
explained =98.9%
unexplained =1.1%
f)
predicted value =-34.037+5.451*9.5 =17.75
10 18.7 20.2 10.2 11.4 13.1 83.6 13.93 (x-x)? 0.3600 0.8100 1.2100 0.6400 0.2500 0.0100 3.2800 SSX (y-7) 15.4711 22.7211 39.2711 13.9378 6.4178 0.6944 98.5133 SSY (x-x)(y-7) 2.3600 4.2900 6.8933 2.9867 1.2667 0.0833 17.8800 w Total Mean 52.8 8.8000 SXY n= sample size: here y 13.9333 8.8000 from above 'E(X--X)2= 3.2800 'E(X-X)(Y-Y)= 17.8800 slope B. = Swy/S0= 5.45122 intercept: B. = V-B,X= -34.03740 hence line equation: -34.037 5.451 x correlation coefficient r= Sxy/(v5.*Syy) = 0.995
.
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