The frequency curve (assuming unimodal) corresponding to the data obtained in an experiment is skewed to the left. What conclusion can be drawn from the curve ?

The variance of five positive observations is 3.6. If four of the observations are 2, 2, 4, 5 then what is the remaining observation ?

What is the coefficient of mean deviation of 21, 34, 23, 39, 26, 37, 40, 20, 33, 27 (taken from mean)?

Consider the following for the next three (03) items that follow :

The algebraic sum of the deviations of a set of values x₁, x₂, x₃, ⋯, x_n measured from 100 is -20 and the algebraic sum of the deviations of the same set of values measured from 92 is 140.

What is the mean of the values?