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Mathematics, 06.08.2021 04:20 oopfloop2

One of the leading dot-com companies has found that the proportion of customers who come into its web site that actually makes a purchase is 0.045. After changing the design of the web site the company checks whether the 0.045 purchase rate still holds by selecting a random sample of 200 hits on their web site. Given that the 0.045 rate still applies, what is the standard deviation of the sampling distribution of the sample proportion

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