SSC CGL Tier 2 28th January 2022 Statistics

Instructions

For the following questions answer them individually

Question 81

If X follows a Poisson distribution with parameter $$\lambda = 0.2$$, the fourth factorial moment of X is:

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Question 82

For the joint density $$f_{xy}\left(xy\right) = x + \frac{3}{2}y^{2};0\leq x \leq 1,0 \leq y \leq 1$$, the value of $$P\left(0 \leq Y \leq \frac{1}{2}\mid 0 \leq X \leq \frac{1}{2}\right)$$ is:

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Question 83

In the completely randomised design, the variance between columns depicts the difference between the ___ of each group and the ___

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Question 84

For positive data series, the relative position of arithmetic, geometric and harmonic mean is:

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Question 85

In a class of 50 students, 10 have failed and their average of marks is 2.5. The total of marks secured by the entire class is 285. find the average marks of those who have passed.

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Question 86

Given that $$P\left(A\right) = 1/3, P\left(B\right) = 1/4, P\left(A\mid B\right) = 1/6$$, the probability $$ P\left(B\mid A\right)$$ is equal to:

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Question 87

The number of class intervals in a frequency table does NOT depend on:

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Question 88

If the Bowley's coefficient of skewness $$S_{q}$$ is positive, which of the following options is correct?

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Question 89

The first four raw moments of distribution are 2, 136, 320 and 40.000. The coefficient of kurtosis is:

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Question 90

Which of the following is NOT an advantage of tabulation?

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