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Historical data has shown that students at Waynesburg High School have, on average, 2.2 siblings and a standard deviation of 1.4 siblings. Suppose we select

Historical data has shown that students at Waynesburg High School have, on average, 2.2 siblings and a standard deviation of 1.4 siblings. Suppose we select a random sample of 40 Waynesburg High School students. Let bar(x)= the sample mean number of siblings for students in your sample. What is the standard deviation of the sampling distribution of bar(x) and what does it mean?

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