SSC CGL Tier 2 28th January 2022 Statistics

Instructions

For the following questions answer them individually

Question 21

Which two of the following quantities are sample statistics?

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Question 22

'Linseed crops badly spoiled on account of rains' is an example of which option:

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Question 23

A sample of 30 latest, returns on UTI stock with unknown standard deviation reveals a mean return of $4. The estimated standard error of the sample means is 0.02. How much more of the sample (approximately) should be added to reduce the standard error of the sample mean to 0.01?

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Question 24

By the method of moving averages, the seasonal index for four quarters equals to:

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Question 25

The coefficient of mean deviation about median equals to:

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Question 26

If the Standard deviation of a data is 10 and Coefficient of Variation is 50, then the mean of the data is:

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Question 27

The lower quartile of $$f\left(x\right) = \frac{1}{12}\left(5-2x\right); -1 \leq x \leq 2$$ is one root of the quadratic equation:

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Question 28

Which variable type is required to be used more than once in factorial design?

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Question 29

The following measures were computed for a non-symmetrical frequency distribution: mean = 50, coefficient of variation = 35% and Karl Pearson's coefficient of skewness of first type= -0.25. The value of mode of the distribution is:

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Question 30

For the PDF $$f\left(x\right) = \frac{x}{4}; 1< x < 3$$, the $$50^{th}$$ percentile is:

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