As for today, nothing better than some AP Stats homework, some sweatpants, and the couch on a rainy day like today...
Tonight, please complete the following in your textbook:
Page 189: 3, 15a, 17a, 31abcd, 43ab
- This looks like more than it actually is. Remember, if you are asked, "is a linear model appropriate?" you want to check a residual plot. For 15a the residual plot is given. For 31c and 43b you will have to create the residual plot on your calculator
- For 43a, "create a model to predict %bodyfat from weight" means to find the equation of the line of best fit, with weight as the x-variable and %bodyfat as the y-variable.
- This means that you are ignoring the "waist (in)" data for this question!
- For 31, some ages have multiple prices. For instance, the age "1 year" has 2 prices listed. To enter this in your calculator you will need to put two "1's" in L1. One point is (1, 12995) and another is (1, 10950).
- So L1 would look like this....1, 1, 2, 3, 3, 4, 4, 5, 5.....etc.
- For 17a and 31d, remember that we just need to take the square root of R^2 to find r
Tomorrow we'll wrap up our discussion/investigation of residuals and residual plots, and start talking about how we interpret slope, intercept, and R^2. Woooo!
See you all tomorrow!
No comments:
Post a Comment