1
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following can be obtained from an ogive?
A
Mean
B
Median
C
Geometric Mean
D
Mode
2
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?
A
y $$\ge$$ x
B
y $$\le$$ x
C
x = y
D
x < y
3
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
In which one of the following cases would you expect to get negative correlation?
A
The ages of husbands and wifes
B
Shoe size and intelligence
C
Insurance companies profits and the number of claims they have to pay
D
Amount of rainfall and yield of crop
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If the correlation coefficient between x and y is 0.6, covariance is 27 and variance of y is 25, then what is the variance of x?
A
$${9 \over 5}$$
B
$${81 \over 25}$$
C
9
D
81
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