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Question 1 and 2 are related
You run a gizmo factory. Over the
past year the average output of the factory is 480 gizmos and the
standard deviation of that output is 10 units per day.
1 What fraction of sample means from samples of size n = 40 fall within ±3 gizmos from the population mean?
2 Using the population mean and standard deviation above, in repeated
samples of size n = 40, 95% of sample means fall within that fall
within ±_____ gizmos from the population means.