<prompt> Square root of detion is also called as ?Standard detionStandard errorMean detionRange  <response>: Ans. is a i.e., Standard detion o Standard detion is square root of mean detion, so it is also known as Root - means - square - detion. o The steps for calculating SD are ? a First calculate mean y b Then deduct this mean from each value to obtain detion from mean x - .T as we did in calculating mean detion see above. c Now square, each detion x - 72 d Add up the squared detions -- S x - 72 e Divide the result by the number of values observations, i.e. n . f At the end, take square root, which gives the standard detion. 