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You cannot calculate standard deviation for objects such as concrete cubes - you can only calculate standard deviation for some measure - such as side length, surface area, volume, mass, alkalinity or some other measure.

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Q: How do you calculation standard deviation of concrete cubes?
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What is the Standard for Concrete cube Testing?

The standard for concrete cube testing is to put the cube under increased pressure. The pressure is increased until the cube breaks and determines the cubes compression strength.


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