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From a random sample of 400 registered voters in Istanbul, 300 indicated that they would vote in favor of a proposed policy in an

From a random sample of 400 registered voters in Istanbul, 300 indicated that they would vote in favor of a proposed policy in an upcoming focal election. 1. State the necessary condition for the sampling distribution of sample proportions to follow a standard normal distribution. 2. Calculate a 90% confidence interval estimate for the population proportion in favor of this policy.

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