CHAPTER 11 Cooperative Group Activities 609 6. Out-of-class activity Divide into groups of two or three students. The analysis of last digits of data can sometimes reveal whether values are the results of actual measurements or whether they are reported estimates. Find the lengths of rivers in the world, then analyze the last digits to determine whether those lengths appear to be actual measurements or whether they appear to be reported estimates. Instead of lengths of rivers, you could use other variables, such as the following: • Heights of mountains • Heights of tallest buildings • Lengths of bridges • Heights of roller coasters 7. Out-of-class activity Divide into groups of two or three students. Each group should conduct a survey by asking subjects to draw the letter X. Observe how the X is drawn and identify it as one of those shown below or some other approach. Using the four different configurations shown below and a fifth category of “other,” test the claim that the five different categories are all equally likely. 2 1 (a) (b) (c) (d) 1 2 2 1 2 1
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