Measurements of the diameter of a random sample of 100 ball, Ask an Expert

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Measurements of the diameter of a random sample of 100 ball bearings made by a certain machine during one week showed a mean of 0.944 inch and a standard deviation of 0.052 inch.

a) Find a 90% Confidence interval for the mean diameter of all the ball bearings

b) Find a 95% confidence interval for the mean diameter of all the ball bearings

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Category:- Statistics and Probability
Reference No.:- M91010782

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