A process manufactures ball bearings with diameters that are normally distributed with mean 25.1 millimeters and standard

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A process manufactures ball bearings with diameters that are normally distributed with mean 25.1 millimeters and standard deviation 0.08 millimeter.

a. What proportion of the diameters are less than 25.0 millimeters?

b. What proportion of the diameters are greater than 25.4 millimeters?

c. To meet a certain specification, a ball bearing must have a diameter between 25.0 and 25.3 millimeters.

What proportion of the ball bearings meet the specification?

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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