SSC CGL Tier-2 14th September 2018 Statistics

Instructions

For the following questions answer them individually

Question 11

For the given figures of production of a sugar factory, the estimate of the production for 1976 using straight line trend with origin at the year 1972 by the least squares method $$\left(\sum x = 0, \sum x^2 = 28, \sum xy = 56\right)$$ is:

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Question 12

Which of the following methods is NOT used in computation of a seasonalindexfor time series?

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Question 13

The second and fourth moment about mean for a distribution are 4 and 18 respectively. What is the value of Pearson’s coefficient of skewness $$\beta_2$$

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Question 14

For the study purpose, the mean ofthe observations is 148 gm andstandard deviation is 17.4 gm. Approximately, the coefficient of variation equals to:

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Question 15

The variance of degenerate random variable is:

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Question 16

Statistics is not applicable to ........... observation.

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Question 17

The mode (correct to two decimal places) for the given data is:

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Question 18

Which of the following is NOT a wayof the sampling?

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Question 19

Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is:

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Question 20

A Poisson distribution has a double mode at x = 1 and x = 2. The probability for x = 1 or for x = 2 of these two values is:

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