NDA 2018 Paper 2 | Statistics Question 41 | Mathematics

The set of bivariate observations (x₁, y₁), (x₂, y₂), ....... (x_n, y_n) are such that all the values are distinct and all the observations fall on a straight line with non-zero slope. Then, the possible values of the correlation coefficient between x and y are

0 and 1

0 and $$-$$1

0, 1 and $$-$$1

$$-$$1 and 1

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

An analysis of monthly wages paid to the workers in two firms A and B belonging to the same industry gives the following result

Image

The average of monthly wage and variance of distribution of wages of all the workers in the firms A and B taken together are

Rs.1860, 100

Rs.1750, 100

Rs.1800, 81

None of the above

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following can be obtained from an ogive?

Mean

Median

Geometric Mean

Mode

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

In any discrete series (when all values are not same), if x represents mean deviation about mean and y represents standard deviation, then which one of the following is correct?

y $$\ge$$ x

y $$\le$$ x

x = y

x < y

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