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The diameter of stabilizing O-Rings washers manaufactured at a large factory is expected to be normally distributed with a mean of 1.30 inches and a standard deviation of 0.04 inches.
What is the probability that a randomly selected washer will have a diameter of,
1) between 1.28 and 1.30 inches
2) between 1.31 and 1.33 inches
If random samples of 16 washers were selected,
3) What proportion of a sample means would be between 1.31 and 1.33 inches?
4) Compare your results in (2) and (3).
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