The Standard deviation is independent of change of (a) Origin (b) Scale (c) Both (d) none

If mean of squares of deviations of a set of n observations about -2 and 2 are 18 and 10 respectively then standard deviation of this set of observations is 3 (b) 2 (c) 1 (d) None of these

Consider the following statements: 1. Mean in independent of change in scale and change in origin. 2. Variance is independent of change in scale but not in origin. Which of the above statements is/are correct?

If two random variables x and y are related by y=-3x+4 and standard deviation of x is 2 then standard deviation of y is (a) -6 (b) 6 (c) 18 (d) 3.50

The standard deviaton of a data is ….. Of any change in origin but is …..of change of scale .