Historically, Widgets Manufacturing Inc. produces 250 widgets per day. Recently the new owner bought a new machine
Question:
Historically, Widgets Manufacturing Inc. produces 250 widgets per day. Recently the new owner bought a new machine to produce more widgets per day. A sample of 16 days’ production revealed a mean of 240 units with a standard deviation of 35. Construct a confidence interval for the mean number of widgets produced per day. Does it seem reasonable to conclude that the mean daily widget production has changed? Justify your conclusion.
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