1) What is the value of b1? X: 12, 21, 28, 8, 20. Y: 17, 15, 22,19, 24
2) What is the value of b0? X: 12, 21, 28, 8, 20. Y: 17, 15, 22,19, 24
3) What is the equation of the y-hat estimator line? X: 12, 21,28, 8, 20. Y: 17, 15, 22, 19, 24.
a. Y=0.162-16.51x b. y=0.162+16.51x c. Y=16.51-0.162x d.Y=16.51+0.162x
4) If x is increased by 10 units, how much does y-hatchange?
5) Assume b0=12.953, and b1=-2.5. For x=25, predict y.
6) How much correlation is there between x and y? X: 12, 21, 28,8, 20. Y: 17,15, 22, 19, 24.
7) How much of the variability in y is explained by x? X: 12,21, 28, 8, 20. Y: 17, 15, 22, 19, 24.
8) Executives of a video rental chain want to predict thesuccess o a potential new store. The company's researcher beings bygathering information on number o rentals and average family incomefrom several of the chain's present outlets. The results of thateffort are available in the attached data file.
rentals: 710, 529, 314, 504, 619, 428, 317, 205, 468, 545, 607,694. Â
Average family income ($1,000): 65, 43, 29, 47, 52, 50, 46, 29,31, 43, 49, 64
a. y=10.626+9.729x b. y=9.729+10.626x c. y=10.626-9.729x d.y=-9.729-10.626x
9) Following Question 8, How much correlation exists between xand y?
10)Following question 8, How much of the variation in y isaccounted for by x?
