SSC CGL Tier-2 10th August 2022 Statistics
For the following questions answer them individually
If $$r_{p}$$ be partial correlation compound on sample $$r_{AB.c}$$ compound from sample of size n, the test statistic for significance testing is
If the mean and variance of a binomial distribution are 5 and 4, respectively, then the value of n is:
For an experiment we have the following data set: n = 4, $$\sum_{}^{}X = a, \sum_{}^{}Y = 10, \sum_{}^{}XY = 21,\sum_{}^{}X^{2} = 30, \sum_{}^{}Y^{2} = 30$$ the correlation coefficient is -0.8 then the value of a is:
If each observation in a data set for number of employees in different divisions is doubled then the coefficient of quartile deviation:
If the first, second, and third moment about the origin are 2, 8, and 18 respectively, then third moment about mean is
For the variables X and Y, we collect 4 observations with $$\sum_{}^{}X = 10, \sum_{}^{}Y = 14, \sum_{}^{}X^{2} = 30, \sum_{}^{}Y^{2} = 54, \sum_{}^{}XY = 31$$ The regression line y on x is
For the two variables X and Y, the following observations are tabulated.
The spearman's correlation coefficient is:
