A medical researcher wants to test if the proportion of people who frequently have headaches is different
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Question:
A medical researcher wants to test if the proportion of people who frequently have headaches is different between coffee drinkers and noncoffee drinkers. Two independent random samples are collected, one of coffee drinkers and one of noncoffee drinkers. The researchers recorded whether each person has headaches frequently. A chisquare test of homogeneity is used to test the hypothesis and the chi test statistic is calculated to be Suppose the researcher decides to analyze the data using a twoproportion ztest instead, what would be the absolute value of the ztest statistic?
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