Hint(s) Check My W0 A simple random sample of 40 items resulted in a sample mean of 10. The population standard deviation is a' =
Hint(s) Check My W0 A simple random sample of 40 items resulted in a sample mean of 10. The population standard deviation is a' = 9. Round your answers to two decimal places. a. What is the standard error of the mean, 35? 1.423 b. At 95% condence, what is the margin of error
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