A researcher found that 62% of American residents live in a coastal county. He surveyed 1500 randomly selected American residents. What is the approximate standard deviation of the sampling distribution of all samples with n = 1200? (Make sure you add the %) * REQUIRED 1 A population of toy cars has a mean length of 10.5 centimeters and a standard deviation of 5 centimeters. An inspector collects a random sample of 1250 toy cars. What is the approximate standard deviation of the sampling distribution of all samples with n = 1250? (Round to the nearest thousandth!)

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A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?

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