UCSD wants to study the effectiveness of their email campaign. The department surveyed 40 students randomly selected from a contact database. The survey shows 26 of the 40 students surveyed enrolled in one course because of reading the email. 8 of the 40 enrolled in three courses after reading the email, and 6 of the 40 did not enroll even after reading the email.

The effectiveness of the email campaign is measured by course enrollment.

a. Calculate the mean as a measure of central tendency?

b. Calculate the median as a measure of central tendency?

c. Calculate the mode as a measure of central tendency?

d. The population of interest is all UCLA Extension students and the size is 40. True or False?