A process manufactures ball bearings whose diameters are normally distributed with a mean of 2.505 cm and standard deviation of 0.008 cm. Specifications call for the diameter to be in the interval 2.5 ± 0.1 cm. What proportion of the ball bearings will meet the specification?
Added by Kyle N.
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Step 1: Calculate the Z-scores for the lower and upper bounds of the specification interval. Show more…
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