You've been given the following regression estimating undergraduate enrollment:

Enrollment = ? + ?1Tuition + ?2Salary + ?3Amenities + ?4Income + ?5Record + ?6March

where Tuition is the price per credit hour, Salary is the average salary of college graduates (in $1,000), Amenities is total spending on student amenities (student events, rec center, movie nights, etc. in $1,000), Income is the average household income (in $1,000), Record is the football team's winning percentage last year, and finally M arch is a dummy variable that takes a value of 1 if the basketball team was invited to March Madness the previous year. Your results are listed below:

Variable Coefficient Standard Error t-stat p-value Intercept 4,215.50 1,653.14 2.55 0.0139 Tuition -585.63 -103.10 5.68 0.0001 Salary 248.11 198.49 1.25 0.2171 Amenities -1,960.00 -2,041.67 0.96 0.3417 Income -875.78 213.09 4.11 0.001 Record 796.42 375.67 2.12 0.0390 March 1,742.36 -1,271.79 1.37 0.1768