A member of a bicycle club wondered if a relationship existed between how expensive a person€™s bicycle was and how fast that person rode. He found riders with bikes in two categories. One group rode bikes that were classified by a cycling magazine as €œdecent bikes for not too much money.€ The others rode bikes classified as €œamazing, but even Bill Gates would think twice about spending this much for a bike.€ The club member then asked each person to ride solo on a track and time his or her fastest lap. What test should he use to see if there€™s a relationship between the cost of the bike and the speed of the rider?

Select the appropriate statistical technique from among those in Figure 16.7.

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Selecting a relationship test Level of measurement of the variables One ordinal and one One nominal and one Both interval/ratio Both nominal ordinal/interval/ratio ordinal/interval/ratio Use difference test flowchart. Number of Chi-square test of independence Pearson r Spearman r groups is determined by number of levels of nominal variable