Which of the following correctly describes the nature of

The probability of getting a total of 7 on two dice thrown together is:

For the random variable X with probability density function f(x) = (x−3)² /5; x = 3, 4, 5, the variance of X is:

If the sum of lower and upper qualities is 6 and quartile deviation is 1.5, then the value of coefficient of quartile deviation is

For frequency distribution presentation , which option is wrong.

If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:

For the cumulative distribution function

the upper quartile point is

The mean deviation from an average A will be minimum, if A represents:

If the first, second and third moment about origin are 2, 8 and 14. respectively, then Karl Pearson gamma coefficient of skewness y1 is: