Gem Engserv Site Engineer/Site Supervisor Interview Questions and Answers

Standard deviation is a measure of the amount of variation or dispersion of a set of values from its mean.

• Standard deviation of M25 concrete is a measure of the variation of compressive strength values of M25 grade concrete.

• It is calculated using the formula: σ = √(Σ(xi - x̄)² / n), where σ is the standard deviation, xi is the individual value, x̄ is the mean value, and n is the number of values.

• The standard deviation ...read more