OpenIntroOrg Example Exercise: 4.57 (Advanced High School Statistics)

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Suppose the true population proportion were p = 0.5 and a researcher
takes a simple random sample of size n = 50.
(a) Find and interpret the standard deviation of the sample proportion p-hat.
(b) Calculate the probability that the sample proportion will be larger than 0.55 for a random
sample of size 50.

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Example Exercise: 4.57 (Advanced High School Statistics)
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