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Unformatted text preview: standing. Pvalue 0 999 a) 1. The variable of interest is successes. 2. H0: successes are independent of size of stone. 3. H1: successes are not independent of size of stone. 4. = 0.05 5. The test statistic is: = 2 0 r c (O ij  Eij ) 2 i =1 j =1 Eij 6. The critical value is .05 ,1 = 3.84
2 7. The calculated test statistic 8. 2 0 = 13.766 with details below. >
2 0 2 0.05,1 , reject H0 and conclude that there is enough evidence to claim that number of successes and the stone size are not independent.
1 2 All 55 25 80 66.06 13.94 80.00 2 234 36 270 222.94 47.06 270.00 All 289 61 350 289.00 61.00 350.00 Cell Contents: Count Expected count Pearson ChiSquare = 13.766, DF = 1, PValue = 0.000 1 b) Pvalue < 0.005...
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 Spring '09
 KAILASHKAPUR

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