Suppose a recent study stated that the proportion of adults in the general population who drink at most once a week is 0.26. A researcher believes the proportion who drink at most once a week among adults working "white collar jobs is less than in the general population. The researcher collected data from a random sample of 125 adults with "white collar jobs of which 25 stated that they drink at most once a week. The researcher's test statistic is: 0.26-0.20 O a. z= 0.26x (1-0.26) 125 Ob.z= 0.26-0.2 0.2 x (1-0.2) 125 Oc Z= 0.2-0.26 0.26x(1-0.26) 150 0.2 -0.26 Od.z= 0.26x (1-0.26) 125

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