A Machine Shop Requires a Specific Hardness Range on Purchased

question 55

Essay

A machine shop requires a specific hardness range on purchased iron blocks.A machine is used to test the hardness.To be acceptable,the hardness readings need to be between a UTL of 366 and an LTL of 335.The supplier reports that the mean hardness is 350,with a standard deviation of 7.What would the percent defective be for this process using the LTL?

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Definitions:

Fresh Water

Water that has low concentrations of dissolved salts and other total dissolved solids, typically found in lakes, rivers, and groundwater.

Freshwater Lake

A body of water that has low concentrations of salts, typically found inland and not connected to the ocean.

Agriculture

The practice of cultivating soil, growing crops, and raising livestock for food, fiber, and other products.

Soviet Union

A former federation of Communist republics that existed from 1922 to 1991, officially known as the Union of Soviet Socialist Republics (USSR).