Homework 8
material for the quiz on Tuesday, November 29
Quiz 7 will cover Sections 9.3, 9.4, and 10.2.
For Section
10.2, you need to understand the concepts and do simple calculations
(like prediction from a fitted line), but you do not need to be able
to find a regression line by hand.
Problems from the text:
Section 9.3: 11, 13
Section 9.4: 7, 11
Section 10.2: 1 [parts (b)-(e)], 13 [parts (b) and (c)]; for both
problems, use the computer output below, instead of computing the
regression line yourself
Call:
lm(formula = height ~ shoe)
Coefficients:
| | Estimate | Std. Error | t value | Pr(>|t|) |
| (Intercept) | 55.9276 | 1.1473 |
48.75 | 3.47e-11 |
| shoe | 1.3452 | 0.1254 | 10.73 | 5.02e-06 |
Call:
lm(formula = winning.price ~ number.horses)
Coefficients:
| | Estimate | Std. Error | t value | Pr(>|t|) |
| (Intercept) | -10.637 | 12.212 | -0.871 | 0.396 |
| number.horses | 3.201 | 1.471 | 2.176 | 0.044 |