Solved: A sample of 50 lenses used in eyeglasses yields a
Chapter 8, Problem 57E(choose chapter or problem)
Problem 57E
A sample of 50 lenses used in eyeglasses yields a sample mean thickness of 3.05 mm and a sample standard deviation of .34 mm. The desired true average thickness of such lenses is 3.20 mm. Does the data strongly suggest that the true average thickness of such lenses is something other than what is desired? Test using α = .05.
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