Suppose that 43% of people who enter a store will make a purchase. Random samples of people who walk into a particular store is studied, and the proportion of those who made a purchase is found for each sample. Assume that all the samples were the same size. If 40.9% of all sample proportions are less than 0.3886. What was the z-score for 0.3886? What is σp′σp′? z=score for 0.3886 =  σp′σp′ =

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