Question: A sample of 400 provided a sample proportion p = 0.225. Assume that the sampling distribution of p is approximately normal. At 0.05 significance level,

A sample of 400 provided a sample proportion p = 0.225. Assume that the sampling distribution of p is approximately normal. At 0.05 significance level, what is the critical value? At 0.05 significance level, can we conclude that the population proportion is greater than 0.20

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