1
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following statements
1. Variance is unaffected by change of origin and change of scale.
2. Coefficient of variance is independent of the unit of observations.
Which of the statements given above is/are correct?
1. Variance is unaffected by change of origin and change of scale.
2. Coefficient of variance is independent of the unit of observations.
Which of the statements given above is/are correct?
2
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The coefficient of correlation when coefficients of regression are 0.2 and 1.8 is
3
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The variance of 20 observations is 5. If each observation is multiplied by 3, then what is new variance of the resulting observations?
4
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The mean of a group of 100 observations was found to be 20. Later, it was found that four observations were incorrect, which were recorded as 21, 21, 18 and 20. What is the mean if the incorrect observation are omitted?
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