SSC CGL Tier-2 10th August 2022 Statistics
For the following questions answer them individually
If moment generating function of discrete random variable X is $$(q + pe^{t})^{n}$$, then $$E(X^{2})$$ equals to
The standard deviation of Y is double of standard deviation of X. The correlation coefficient between X and Y is 0.5. The acme angle between lines of regression is
To estimate the average work experience of MBA students at a management institute, five students are selected at random from each type of background, say commerce, science and engineering. This type of sampling is called:
Which of the following options is correct when data is classified on the basis of attributes?
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
The arithmetic mean of the following frequency distribution of number of members in family in the society
is
