TABLE 13-01A large national bank charges local companies for…

TABLE 13-01A large national bank charges local companies for using their services. A bank official reported the results of a regression analysis designed to predict the bank’s charges (Y) — measured in dollars per month — for services rendered to local companies. One independent variable used to predict service charge to a company is the company’s sales revenue (X) — measured in millions of dollars. Data for 21 companies who use the bank’s services were used to fit the model: Y = β0 + β1X+εThe results of the simple linear regression are provided below.  = -2,700 + 20X, SYX = 65, two-tailed p value = 0.034 (for testing  β1)Referring to Table 13-1, a 95% confidence interval for β1 is (15, 30). Interpret the interval.

TABLE 13-6The following EXCEL tables are obtained when “Scor…

TABLE 13-6The following EXCEL tables are obtained when “Score received on an exam (measured in percentage points)” (Y) is regressed on “percentage attendance” (X) for 22 students in a Statistics for Business and Economics course.        Referring to Table 13-6, which of the following statements is true?