=+b. Calculate an estimate of the average change in quit rate associated with a $1 increase in average hourly wage, and do so in a way that conveys information about the precision and reliability of the estimate.

13.19 The article “Cost-Effectiveness in Public Education” (Chance [1995]: 38–41) reported that, for a sample of n 5 44 New Jersey school districts, a regression of y 5 average SAT score on x 5 expenditure per pupil

(thousands of dollars) gave b 5 15.0 and sb 5 5.3.