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The length of a door handle (in cm), manufactured by a factory, is normally distributed with µ = 6.0 and σ = 0.2 . The place to fix on the door can allow error in length up to 0.3 cm. What percentage of handles manufactured in the factory will be defective? How much should be the value of σ , so that the number of defectives in reduced to only 5%?
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