The bars of a histogram:

A researcher surveys students sitting in the cafeteria.

Jersey numbers are measured at the:

Several classrooms are randomly selected and all students in those classrooms are surveyed.

Find the mean: 11, 15, 19, 23, 27

For a normal distribution, 95% of observations lie within:

Data: 5, 10, 15, 20, 25, 30, 35. What is Q2?

Find the median: 3, 6, 8, 10, 14

Which graph uses adjacent bars?

Find the median: 12, 15, 18, 21, 24