The National Center for Education Statistics publishes information about school enrollment in the Digest of Education Statistics. Table 4.17 provides a contingency table for enrollment in public and private schools by level. Frequencies are in thousands of students.

a. How many cells are in this contingency table?

b. How many students are in high school?

c. How many students attend public schools?

d. How many students attend private colleges?

TABLE 4.17 Enrollment by level and type Level Type Public Private T1 T2 Total Elementary 36,161 4,073 40,234 L1 High school 14,877 1,103 15,980 L2 College 15,909 6,059 21,968 L3 Total 66,947 11,235 78,182

* School Enrollment.