The manager of the electronics department at a large department store is interested in knowing the...
The manager of the electronics department at a large department store is interested in knowing the mean size of a TV screen that a customer purchases. Based upon industry standards it is believed that the size of the screen is normally distributed with the standard deviation 6 inches.
Determine the margin or error for estimating the mean screen size with 95% confidence when n=36 and x̅ =45.
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