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. In repeated random samples of size n = 40 days, the expected value of sample mean is:

Hey! So if the average is 480 per day then in 40 days of samples the expected value for sample mean should be 480 gizmos. answer 480

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