SSC CGL Tier-2 14th September 2018 Statistics

Instructions

For the following questions answer them individually

Question 1

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:

Question 2

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:

Question 3

The $$4^{th}$$ decile for the given data is:


Question 4

The Mean deviation about Median forthe given data.
52, 56, 66, 70, 75, 80, 82 is:

Question 5

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:

Question 6

The memory-less property is followed by which of the following continuous distribution:


Question 7

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:

Question 8

The Excess Kurtosis of the Geometric distribution with parameter p is:

Question 9

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:


Question 10

Which one is parameter from population?

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