# tact sport athletes than for the noncontact athletes?Use a one-tailed test with a = .05.b. Compute the value of r (percentage of varianceaccounted for) for these data.14. In the Chapter Preview we presented a study show-ing that handling money reduces the perception pain(Zhou, Vohs, & Baumeister, 2009). In the experiment,a group of college students was told that they wereparticipating in a manual dexterity study. Half of thestudents were given a stack of money to count and theother half gota stack of blank pieces of paper. Afterthe counting task, the participants were asked to diptheir hands into bowls of very hot water (122°F) andrate how uncomfortable it was. The following datashow ratings of pain similar to the results obtainedin the study. 332CHAPTER 10 | The t Test for Two Independent SampSit ol nBlCounting MoneyCounting Paper811CLonbrbos 13klelonbuonl bi1000.T108S40100*119E0Ac15ES701r Tr1214100ai bonersSTETPCTsOU 2qust ova1251 bolrh ota. Is there a significant difference in reported painbetween the two conditions? Use a two-tailed testjacs (S10) Istb ionilhllwith o .01.TAoMb. Compute Cohen's d to estimate the size of thetreatment effect.5. In a classic study in the area of problem solving,Katona (1940) compared the effectiveness of twomethods of instruction. One group of participants wasshown the exact, step-by-step procedure for solving aproblem and was required to memorize the solution.Participants ina second group were encouraged tostudy the problem and find the solution on their2U3

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Number 14

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Step 1

Consider that n1 and n2 are the sample sizes of counting money and counting paper, respectively.

Consider that S1 and S2 are the sample standard deviations of counting money and counting paper, respectively.

Step 2

Since, the given information is that:

Step 3

Further,...

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