TABLE 14-15
The superintendent of a school district wanted to predict the percentage of students passing a sixth-grade proficiency test.She obtained the data on percentage of students passing the proficiency test (% Passing),mean teacher salary in thousands of dollars (Salaries),and instructional spending per pupil in thousands of dollars (Spending)of 47 schools in the state.
Following is the multiple regression output with Y = % Passing as the dependent variable,X1 = Salaries and X2 = Spending: 
-Referring to Table 14-15,what are the lower and upper limits of the 95% confidence interval estimate for the effect of a one thousand dollar increase in instructional spending per pupil on the mean percentage of students passing the proficiency test?
Definitions:
Industrial Buyer
An individual or organization that purchases goods or services for use in the production of other products or for resale.
Consumer Products
Goods that are purchased by individuals for personal use rather than for manufacturing or resale.
Shopping Effort
The amount of time and energy consumers expend to complete a purchase, including research, comparison, and decision-making processes.
Resale
The act of selling a product or service again after it has been purchased, often used goods.
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