This Instructional Activity is a part of the Lesson 8, Unit 6, Grade 6. Read through the first paragraph as a class. Since the means are about the same, it would be helpful if Robert had more information as the basis for a decision. One possibility is that he can take the information about month-to-month variability in the temperatures into consideration. In Exercise 2, you found that the mean of the monthly temperatures in both the New York City distribution and the San Francisco distribution was about the same.