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(Solved): A simple random sample of 20 items resulted in a sample mean of 10 . The population standard deviat ...



A simple random sample of 20 items resulted in a sample mean of 10 . The population standard deviation is o \( =4 \). Round y
A simple random sample of 20 items resulted in a sample mean of 10 . The population standard deviation is o . Round your answers to tun desimal placies. at. Wisat is the standard error of the mean, ? b. At confidence, what is the margin of errot?


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Sample mean, x? = 10Popu
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