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Chapter 14: Q 9 (page 588)
Fill in the blank: is toasis to
is to
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14.94 Custom Homes. Following are the size and price data for custom homes from Exercise 14.24.
| x | 26 | 27 | 33 | 29 | 29 | 34 | 30 | 40 | 22 |
| y | 540 | 555 | 575 | 577 | 606 | 661 | 738 | 804 | 496 |
a. Determine a point estimate for the mean price of all Equestrian Estate homes.
b. Find a confidence interval for the mean price of al Equestrian Estate homes.
c. Find the predicted price of a Equestrian Estate home
d. Determine a prediction interval for the price of a Equestrian Estate home.
Acreage and Value. The document Arizona Residential Property Valuation System, published by the Arizona Department of Revenue, describes how county assessors use computerized systems to value single-family residential properties for property tax purposes. On the WeissStats site are data on lot size (in acres) and assessed value (in thousands of dollars) for a sample of homes in a particular area.
In Exercises 14.98-14.108, use the technology of your choice to do the following tasks.
a. Decide whether your can reasonably apply the conditional mean and predicted value t-interval procedures to the data. If so, then also do parts (b) - (h).
b. Determine and interpret a point estimate for the conditional mean of the response variable corresponding to the specified value of the predictor variable.
c. Find and interpret a Te confidence interval for the conditional mean of the response variable corresponding to the specified value of the predictor variable.
d. Determine and interpret the predicted value of the response variable corresponding to the specified value of the predictor variable.
e. Find and interpret a prediction interval for the value of the response variable corresponding to the specified value of the predictor variable.
f. Compare and discuss the differences between the confidence interval that you obtained in part (c) and the prediction interval that you obtained in part (e).
14.10 PCBs and Pelicans. The data from Exercise for shell thickness and concentration of PCBs of Anacapa pelican eggs are on the WeissStats site. Specified value of the predictor variable: .
In this Exercise 14.5, we repeat the information from Exercise 14.14.
a. Decide, at the significance level, whether the data provide sufficient evidence to conclude that is useful for predicting :
b. Find a confidence interval for the slope of the population regression line.
14.23 Corvette Prices. The Kelley Blue Book provides information on wholesale and retail prices of cars. Following are age and price data for 10 randomly selected Corvettes between 1 and 6 years old.
Here, denotes age, in years, and denotes price, in hundreds of dollars.
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