Question

SECTION 9.2 In Exercises 9-12, find the equation of the regression line for the data. Then construct a scatter plot of the data and draw the regression line. (Each pair of variables has a significant correlation.) Then use the regression equation to predict the value of y for each of the .r-values, if meaningful. If the x-value is not meaningful to predict the value of y, explain why not. If convenient, use technology. of milk produced

Answer 1

35 20 (v-v1 0.51 7.37 NOWNZ 5 1.65 (x-x) 172.7347 792.0204 117.8776 37.7347 394.3061 102.8776 7213061 2338.8571 SSX 42 68 38 75 337 48.143 5 (x-x}(y-7) -9.3878 -76.3878 -13.9592 17551 -25.5306 -17.3878 -613878 -202.2857 SXY 0.08 1.65 2.94 5.22 19.43 SSY 8 Total Mean 44 6.29 sample size: n= here y 6.2857 48.1429 Sxx (X-X) - EIX-X)Y:-)= slope= = S/S - intercept = y-BRE Least square line equation: y = 10.45+-0.086'x 2338.857 -202.286 -0.0865 10.4495

a)

No meaningful , since x=16 falls outside the range of x values

b)

predicted val=10.45+25*-0.086=

8.3 Hours

c)

No meaningful , since x=16 falls outside the range of x values

d)

predicted val=10.45+50*-0.086=

6.15 hours