The weight of a certain type of brick has an expectation of 1.12 kilograms with a variance of…

The weight of a certain type of brick has an expectation of 1.12 kilograms with a variance of…

The weight of a certain type of brick has an expectation of 1.12 kilograms with a variance of 0.0009 kilogram. How many bricks would need to be selected so that their average weight has a standard deviation of no more than 0.005 kilogram?

 

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