1
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the covariance between x and y is 30, variance of x is 25 and variance of y is 144, then what is the correlation coefficient?
2
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A random sample of 20 people is classified in the following table according to their ages.
What is the mean age of this group of people?
| Age | Frequency |
|---|---|
| 15-25 | 2 |
| 25-35 | 4 |
| 35-45 | 6 |
| 45-55 | 5 |
| 55-65 | 3 |
What is the mean age of this group of people?
3
NDA 2016 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What is the mean deviation from the mean of the numbers 10, 9, 21, 16, 24 ?
4
NDA 2016 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If the total number of observations is 20, $$\sum {x_i^{}} $$ = 1000 and $$\sum {x_i^2} $$ = 84000, then what is the variance of the distribution?
Questions Asked from Statistics (Marks 2.5)
Number in Brackets after Paper Indicates No. of Questions
NDA Subjects
Mathematics
Algebra
Sets, Relations and Functions Logarithms Quadratic Equations and Inequalities Sequence And Series Binomial Theorem Matrices Determinants Permutations and Combinations Probability Complex Numbers Vector Algebra Three Dimensional Geometry Statistics
Trigonometry
Trigonometric Angles and Equations Inverse Trigonometric Function Height and Distance Properties of Triangles
Coordinate Geometry
Calculus
English
General Studies