you are tasked to identify whether there is or is not a relationship between a d

Question

you are tasked to identify whether there is or is not a relationship between a disease risk factor and later onset of an adverse event. Reviewing patient charts, you found that 34 patients who were exposed the risk factor later displayed disease symptoms. However, you also found that 28 patients that were also exposed did not display disease symptoms. A total of 10 patients who were not exposed to the risk factor displayed disease symptoms. Ten patients who were not exposed did not display any disease symptoms. Report Cramer's V for this distribution. Provide your answer with a level of accuracy of 2 decimal places

Explanation / Answer

Here Cramer's V = Sqrt [X2 / n(k-1)]

Here now, we have to find chi-square

Expected table

HEre

X2 = (O- E)2/E

= (34 - 33.27)2 /33.27 + (10 - 10.73)2 /10.73 + (10 - 9.27)2 /9.27 + (28 - 28.73)2/28.73 = 0.1424

Cramer V = sqrt [0.1424/ (2 * 1)] = 0.267 or 0.27

Expected Disease symptoms No Disease symptoms Total Exposed 33.27 28.73 62 Not exposed 10.73 9.27 20 Total 44 38 82

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