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1.A company conducts a good study of the length of its inch screw.In a sample of 325 screws, the mean length was 0.25 inches, with

1.A company conducts a "good" study of the length of its inch screw.In a sample of 325 screws, the mean length was 0.25 inches, with a standard deviation of 0.08 inches.For a 95% confidence interval:

a.Find the margin of error.

b.Find and interpret the 95% confidence interval.

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