Question

7. 1/4 points Previous Answers PriviteraStats 17.E.021. My Notes Ask Your Teacher A psychologist studying addiction tests whether cravings for cocaine and relapse are independent. The following table lists the observed frequencies in the small sample of people who use drugs. Relapse Obs. Freq. Cravings Yes No Yes 20 10 30 No9 1928 29 29 N = 58 (a) Conduct a chi-square test for independence at a 0.05 level of significance. (Round your answer to two decimal places.) Decide whether to retain or reject the null hypothesis. Retain the null hypothesis. O Reject the null hypothesis. (b) Compute effect size using and Cramer's V. Hint: Both should give the same estimate of effect size. (If necessary, round your intermediate steps to two or more decimal places. Round your answers to two decimal places.) VEO

Answer 1

Solution A POcholegi(Gteding odiCo +s chether Crovi Rced infotion i gin Yes Crouirgas tota Yels ND 20 30 No 28 5 8 tote Cerkuct test for indepersene Lb hole to oblained th 8 test inde ren the Ckre, chi-G2ure test xrecled Valua is totas Cauinys 15 Vals 30 No 28 Hotal 29 58 obSered Va S

Vels No CravingsVe 30 58 tast Ca-lu2 Ca- do - 5)- -15) 5 l6667 6667 85 85 ১2+* s ৭०५s g 6.Q0t 8 >tond octt tbe pa kst, dfca!) CC-1) Palue= J IT df C6.aou8,1 Ralue o-oo66 Decision cE hale to Compared the pValtua ard ao 05

Cre Pala 0.05 o. o08 yportheci atao.o5 SCve roeje Ckd the Nu Theie foie Opton G COrieC anor Compurte EtRCH SIe uing ond Croms Vl- have to obained the E fRcive and CCIGig Cue Cramers V 1s Elere restIn 6.9018 6 s3I3 8 alua is $+et V= 6.ao 8 CUx 1

6-9048 26 2 1- (31 3138 Thereore, 318 V=