SSC CGL Tier-2 14th September 2018 Statistics
For the following questions answer them individually
The prices (in ₹) of different yarns (per kg) in two consecutive years are as follows.
By simple aggregative method, the net price changes in % is:
The average working hours per month of the staff aged over 50 yearsin a factory were 160 and that of the staff aged under 50 years were 210. The mean working hour per month of all the staff was 200. The ratio of the numberofthe staff aged over50 to thatof the staff aged under 50 is:
For a random variable x , the central moments $$(\mu_i)$$ of all order exist. The square of $$(2j + 1)^{th}$$ moment $$(\mu^2_{2j+1})$$ is always:
If the random sample of size n is drawn without replacement from finite population of size N , the correction factor for standard error of sample mean will be:
Let $$\left\{X_i, i \geq 1\right\}$$ be independent and identically distributed random variables with  $$P(X_i = 1) = p = 1 - P(X_i = 0), S_n = \sum_{i=1}^n X_i$$. The distribution of $$S_n$$ is:
