Back"Constructing and Interpreting a Prediction Interval In Exercises 21-30, construct the indicated prediction interval and interpret the results.
29. New Vehicle Sales Construct a 95% prediction interval for new vehicle sales for General Motors in Exercise 19 when the number of new vehicles sold by Ford is 2028 thousand."
"Constructing and Interpreting a Prediction Interval In Exercises 21-30, construct the indicated prediction interval and interpret the results.
30. New Vehicle Sales Construct a 99% prediction interval for new vehicle sales for Honda in Exercise 20 when the number of new vehicles sold by Toyota is 2159 thousand."
"In Exercises 17 and 18, use the data to (a) find the coefficient of determination r^2 and interpret
the result, and (b) find the standard error of estimate s_e and interpret the result.
18. [APPLET] The table shows the cooking areas (in square inches) of 18 gas grills and their prices (in dollars). The regression equation is y = 1.501x - 341.501. (Source: Lowe's)
"In Exercises 17 and 18, use the data to (a) find the coefficient of determination r^2 and interpret
the result, and (b) find the standard error of estimate s_e and interpret the result.
17. The table shows the times (in seconds) to accelerate from 0 to 60 miles per hour and the top speeds (in miles per hour) for eight electric cars. The regression equation is y =- 14.399x + 196.996. (Source: Car and Driver)
"1. Net Sales The equation used to predict the net sales (in millions of dollars) for a fiscal
year for a clothing retailer is y=23,769 + 9.18x_1 - 8.41x_2
where x_1 is the number of stores open at the end of the fiscal year and x_2 is the average
square footage per store. Use the multiple regression equation to predict the y-values for
the values of the independent variables.
a. x_1 = 1057, x_2 = 3698
b. x_1 = 1012, x_2 = 3659
c. x_1 = 952, x_2 = 3601
d. x_1 = 914, x_2 = 3594"
"[APPLET] For Exercises 2–9, use the data in the table, which shows the average annual salaries (both in thousands of dollars) for librarians and postsecondary library science teachers in the United States for 12 years. (Source: U.S. Bureau of Labor Statistics)
6. Use the regression equation that you found in Exercise 5 to predict the average annual salary of postsecondary library science teachers when the average annual salary of librarians is $61,000."
"9. Stock Price The equation used to predict the stock price (in dollars) at the end of the year for a restaurant chain is y=- 86+7.46x_1 - 1.61x_2
where x_1 is the total revenue (in billions of dollars) and x_2 is the shareholders' equity (in
billions of dollars). Use the multiple regression equation to predict the y-values for the
values of the independent variables.
a. x_1 = 27.6, x_2 = 15.3
b. x_1 = 24.1, x_2 = 14.6
c. x_1 = 23.5, x_2 = 13.4
d. x_1 = 22.8, x_2 =15.3"
"The U.S. Food and Drug Administration (FDA) requires nutrition labeling for most foods. Un FDA regulations, manufacturers are required to list the amounts of certain nutrients in their foods, such as calories, sugar, fat, and carbohydrates. This nutritional information is displayed in the ""Nutrition Facts"" panel on the food's package.
The table shows the nutritional content below for one cup of each of 21 different breakfast
cereals.
C = calories
S = sugar in grams
F = fat in grams
R = carbohydrates in grams
7. Use the equations from Exercise 6 to predict the calories in 1 cup of cereal that has 7 grams of sugar, 0.5 gram of fat, and 31 grams of carbohydrates."