CHAPTER 6 Cooperative Group Activities 309 5. In-class activity Divide into groups of three or four students. Using a coin to simulate births, each individual group member should simulate 25 births and record the number of simulated girls. Combine all results from the group and record n = total number of births and x = number of girls. Given batches of n births, compute the mean and standard deviation for the number of girls. Is the simulated result unusual? Why or why not? 6. In-class activity Divide into groups of three or four students. Select a set of data from one of these data sets in Appendix B: 2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 23, 26, 27, 28, 29, 30, 34, 35, 39, 40, 41, 42, 43. (These are the data sets that were not used in examples or exercises in Section 6-5). Use the methods of Section 6-5 to construct a histogram and normal quantile plot, then determine whether the data set appears to come from a normally distributed population. 7. Out-of-class activity Divide into groups of three or four students and have each group collect an original data set of values at the interval or ratio level of measurement. Test for normality and provide reasons why the data set does or does not appear to be from a normally distributed population. 8. In-class activity Divide into groups of three or four students. In each group, develop an original procedure to illustrate that the median is a biased estimator. 9. In-class activity Divide into groups of three or four students. In each group, develop an original procedure to illustrate that the range is a biased estimator.
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