SSC CGL Tier-2 10th August 2022 Statistics
For the following questions answer them individually
If first, second, and third moment about origin are 1, 6, and 15 respectively, then Karl Pearson beta coefficient of skewness $$\beta_{1}$$ is
The Pearson's correlation coefficient between following observation
is - 0.8. If each observation of X is halved and of Y is doubled, then Pearson's correlation coefficient equals to
From standard pack of 52 cards, 3 cards are drawn at random without replacement. The probability of drawing a king, a queen and a jack in order is
If the second and third moment about the origin are 8 and 18 and the third moment about mean is -14 , then the first moment about the origin is:
For the random variable X with probability density function $$f(x) = \frac{(x - 3)^{2}}{5}$$; x = 3, 4, 5, the variance of X is:
