1
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
A sample of 5 observations has mean 32 and median 33. Later it is found that an observation was recorded incorrectly as 40 instead of 35. If we correct the data, then which one of the following is correct?
2
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The correlation coefficient computed from a set of 30 observations is 0.8. Then, the percentage of variation not explained by linear regression is
3
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The average age of a combined group of mean and women is 25 yr. If the average age of the group of men is 26 yr. and that of the group of women is 21 yr, then the percentage of men and women in the group is respectively
4
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following statements
1. If 10 is added to each entry on a lists, then the average increases by 10.
2. If 10 is added to each entry on a list, then the standard deviation increases by 10.
3. If each entry on a list is doubled then the average doubles.
Which of the above statements are correct?
1. If 10 is added to each entry on a lists, then the average increases by 10.
2. If 10 is added to each entry on a list, then the standard deviation increases by 10.
3. If each entry on a list is doubled then the average doubles.
Which of the above statements are correct?
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