Class 27. Example: Height and Weight Case: Colonial Broadcasting (HBS: 9-894-011). Heights and Weights of n=30 11-year-old girls. Al used the regression of KG on CM to forecast the weight of a girl 144.8 cm tall. Al’s point forecast was _______________. Sample Means. The regression line.
Example: Height and Weight
Case: Colonial Broadcasting(HBS: 9-894-011)
Al used the regression of KG on CM to forecast the weight of a girl 144.8 cm tall.
Al’s point forecast was _______________
Always goes thru
Any three can be used to find the fourth.
Bo regressed KG on inches. Which model will be the better predictor of KG?
They should give identical results.
1b. How big was the ratings gap between the top and bottom ranked networks?
2b. Is the difference in fact and fiction ratings statistically significant?
3. Which is most true? per inch?
fact-based movies had fewer stars (than fictional movies)
Fact-based movies had more stars.
Fact-based movies had the same number of stars.
Cannont be determined.
4. On Sunday night, CBC usually airs “ per inch?Josette and Yvette” at 8 pm followed by the Sun night movie. “J&Y” typical get a 17.5 rating. If they replace “J&Y” with a rock concert expected to get a rating of 20, what is the expected change in the movie rating?
5. A high-ranking CBC exec argued that network programming does not affect total size of network audience, only the relative share each network receives. Does the regression support or refute this assertion?
6. BBS’s new movie is fiction- based with 2 stars. We don’t know when it will be aired. Will it’s rating exceed the 1992 average for BBS movies?