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Exam Details

2024 Statistics Paper - I

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Questions 80
Duration 180 mins
Package National Defence Academy and Naval Academy Examination (I) & (II) - Previous Year Papers

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Difficulty distribution

Medium 27 33.8%
Hard 27 33.8%
Easy 26 32.5%

Question type distribution

Multiple Choices 80 100%

Syllabus

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Sample questions from this paper

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1
2024 · Unclassified
2024 Statistics Paper - I
If X(1), X(2), X(3), X(4), X(5) are order statistics from a population with pdf f(x) = 2e−2x, x > 0, then what is the density function of X(1)?
A
10e−10x(1)
B
1 - e−2x(1)
C
1 - e−10x(1)
D
10e−2x(1)
2
2024 · Unclassified
2024 Statistics Paper - I
What is the moment-generating function of S2? (a) \( \left(1 - 2(n-1)t/\sigma² \right)^{-n-1/2} \) (b) \( \left(1 - (n-1)t/\sigma² \right)^{-n-1/2} \) (c) \( \left(1 - 2\sigma² t/n-1 \right)^{-n-1/2} \) (d) \( \left(1 - \sigma² t/n-1 \right)^{-n-1/2} \)
A
\(\left(1 - 2(n-1)t/\sigma² \right)^{-n-1/2} \)
B
\(\left(1 - (n-1)t/\sigma² \right)^{-n-1/2} \)
C
\(\left(1 - 2\sigma² t/n-1 \right)^{-n-1/2} \)
D
\(\left(1 - \sigma² t/n-1 \right)^{-n-1/2} \)
3
2024 · Unclassified
2024 Statistics Paper - I
If \( r = 1/2 \Gamma \left( \frac{n-3/2 \right)}{\Gamma \left( n-1/2 \right)} , n > 3 \) then what is the value of \( E \left( 1/S² \right) \)?
A
\((n-1)r/\sigma² \)
B
\(nr/\sigma² \)
C
\(2nr/\sigma² \)
D
\(nr/2\sigma² \)
4
2024 · Unclassified
2024 Statistics Paper - I
Consider the following for the next three (3) items that follow: Let X1, X2, X3, ..., Xn be iid U(0, 1) variates and T = -ln (X1X2X3 ... Xn). What is E(T) equal to?
A
n
B
2n
C
4n
D
n / 2
5
2024 · Unclassified
2024 Statistics Paper - I
What is Var (T) equal to?
A
4n
B
3n
C
2n
D
n
6
2024 · Unclassified
2024 Statistics Paper - I
What is the moment-generating function of T?
A
(1 - 2t)−2n
B
(1 - t)−2n
C
(1 - t)−n
D
(1 - 2t)−n/2