How to calculate standard deviation for concrete cubes?
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hey mate ur ans
we want to know how widely spread the readings are. The spread of values tells us something about the uncertainty of a measurement. By knowing how large this spread is, we can begin to judge the quality of the measurement or set of measurements.
The usual way to quantify spread is standard deviation. The standard deviation of a set of numbers tells us about how different the individual readings typically are from the average of the set.
Mathematically standard deviation is stated as, the root mean square deviation of all the result. This is denoted by σ.

Standard deviation will be less if the quality control at site is better and most of the test results will be clustered mere the mean value. If quality control is poor, the test results will have much different from mean value and therefore, standard deviation will be higher.
hope it helps
we want to know how widely spread the readings are. The spread of values tells us something about the uncertainty of a measurement. By knowing how large this spread is, we can begin to judge the quality of the measurement or set of measurements.
The usual way to quantify spread is standard deviation. The standard deviation of a set of numbers tells us about how different the individual readings typically are from the average of the set.
Mathematically standard deviation is stated as, the root mean square deviation of all the result. This is denoted by σ.

Standard deviation will be less if the quality control at site is better and most of the test results will be clustered mere the mean value. If quality control is poor, the test results will have much different from mean value and therefore, standard deviation will be higher.
hope it helps
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