CHAPTER 10 Cooperative Group Activities 575 7. In-class activity Leonardo DaVinci did extensive research on human bodies and he formed many different conclusions including this one: “Length of foot is one seventh of height.” Divide into groups of two and use the ANSUR II data to investigate that claim. 8. In-class activity Use a ruler as a device for measuring reaction time. One person should suspend the ruler by holding it at the top while the subject holds his or her thumb and forefinger at the bottom edge, ready to catch the ruler when it is released. Record the distance that the ruler falls before it is caught. Convert that distance to the time (in seconds) that it took the subject to react and catch the ruler. (If the distance is measured in inches, use t = 2d>192. If the distance is measured in centimeters, use t = 2d>487.68.) Test each subject once with the right hand and once with the left hand, and record the paired data. Test for a correlation. Find the equation of the regression line. Does the equation of the regression line suggest that the dominant hand has a faster reaction time? 9. In-class activity Divide into groups of 8 to 12 people. Record the pulse rate of each group member while he or she is seated. Then record the pulse rate of each group member while he or she is standing. Is there a relationship between sitting and standing pulse rate? If so, what is it? 10. Out-of-class activity Each student should use a sheet of paper and a paperclip to construct a “whirlybird” such as the one shown here. Instructions can be found on the Internet using the search term “make a whirlybird from paper.” Each whirlybird should be dropped from a height of six feet and a stopwatch should be used to record the time it takes to reach the floor. For each whirlybird, record the time it takes to fall and the length of its wings. Test for a correlation between the times and the lengths of wings. 11. In-class activity Divide into groups of three or four people. Appendix B includes many data sets not yet included in examples or exercises in this chapter. Search Appendix B for a pair of variables of interest, then investigate correlation and regression. State your conclusions and try to identify practical applications. 12. Out-of-class activity Divide into groups of three or four people. Investigate the relationship between two variables by collecting your own paired sample data and using the methods of this chapter to determine whether there is a significant linear correlation. Also identify the regression equation and describe a procedure for predicting values of one of the variables when given values of the other variable. Suggested topics: • Is there a relationship between taste and cost of different brands of chocolate chip cookies (or colas)? Taste can be measured on some number scale, such as 1 to 10. • Is there a relationship between salaries of professional baseball (or basketball or football) players and their season achievements? • Is there a relationship between student grade-point averages and the amount of television watched? If so, what is it?
RkJQdWJsaXNoZXIy NjM5ODQ=