Business Statistics Paper 6

Var(X) = 4 and Var(Y) =9. If X and Y are independent random variable then Var(2X + Y) is:

The moments about origin are called:

The first moment about X = 0 of a distribution is 12.08. The mean is:

In a symmetrical distribution, the coefficient of skewness will be:

If mean=20, median=16 and standard deviation=2, then coefficient of skewness is:

If the sum of deviations from median is not zero, then a distribution will be:

The lower and upper quartiles of a distribution are 80 and 120 respectively, while median is 100. The shape of the distribution is:

The value of β2 can be:

The degree to which numerical data tend to spread about an average value called:

Given below the four sets of observations. Which set has the minimum variation?