A statistics teacher has 4 periods of introductory statistics. She wants to get students’ opinions on a new homework policy. To get a sample, the teacher randomly selects 1 period and surveys all of the students in that class. Which sampling method was used? A.) cluster sampling
B.) simple random sampling
C.) stratified random sampling
D.) systematic random sampling

Based upon past experience, barry expects no overdrafts. he expects no 2nd copies of statements. barry estimates that he will use network atms about 5 times a month with either bank. barry decides in the end to choose eecu. assuming that both banks provide the necessary services equally well, and based upon the tables of fees given above, how much can barry reasonably expect to save annually by choosing eecu in this case over e-town bank? a. $72 b. $78 c. $144 d. $24

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Which of the following contains a variable?