kindly solve this

21.The measure used to calculate the variation present among the observation in the unit of the varialole is called * {1.5 Points) 0 Coefficient of skewness 0 Relative measures of dispersion O Coefficient of variation 0 Absolute measures of dispersion 22.Which of the following statements is always true? * {1 Point] 0 Extreme scores influence the mean 1! boogie {.Zhru O The mean inuences extreme scores El 0 The median influences extreme scores 0 Extreme scores influence the median 23. The scatter in a series of values about average is called * (1.5 Points) The median influences the extreme scores Skewness Extreme scores influences the mean Extreme score influence the median 24. A discrete probability function f(x) is always: * (1 Point) O Zero One Non-negative Negative