1. The normal curve in a distribution is
(i) Symmetrical, bell shaped continuously curve
(ii) Asymmetrical, bell shaped continuously curve
(iii) Symmetrical, bell shaped curve which does not
touch the ‘X’ axis
(iv) Bell
shaped curve
Codes :
(A) (i) and (iv) are correct.
(B) (i) and (iii) are correct.
(C) (ii) and (iv) are correct.
(D) (i) is correct.
2. A subject has a
T score (Mean = 50; SD = 10) of 40 on an abstract reasoning test. The
corresponding percentile rank would be
(A) 16
(B) 34
(C) 40
(D) 84
3. If the standard deviation of a population is 20
and the standard error of mean is 4, then the sample size is
(A) 100
(B) 80
(C) 5
(D) 25
4. In a multiple regression model, the explained
variance per d.f. is 50 and unexplained variance per d.f. is 10. The F-ratio is
(A) 2.5
(B) 5
(C) 25
(D) 0.2
5. Which one of the following is not a random
sampling method?
(A) Stratified Sampling
(B) Judgement Sampling
(C) Systematic Sampling
(D) Cluster Sampling
6. Assertion (A): χ2 distribution is a non-parametric
distribution.
Reason (R): χ2 is a sample statistic having no
corresponding population parameter.
Codes:
(A) Both (A) and (R) are correct and (R) is the
correct explanation of (A).
(B) Both (A) and (R) are correct, but (R) is not the
correct explanation of (A).
(C) (A) is true, but (R) is false.
(D) Both (A) and (R) are false.
7. In a simple regression analysis of y on x, the
standard error of estimate of y on x, Syx = 5, number of observations N is 30,
and ∑ y2 = 2000. The
unexplained variance is
(A) 1500
(B) 750
(C) 500
(D) 250
8. Two normal populations
have variances σ21 =
10 and σ22 =
20. Two random samples of sizes 25 and 20, independently selected from these
populations have variances of S21 = 8 and S22 = 15, respectively. What is the F(24,
19) statistic?
(A) 1
(B) 2
(C) 2.81
(D) 3.6
9. The events A and B are mutually exclusive. If P
(A) = 0.5 and P(B) = 0.2, then what is P(A & B)?
(A) 0.5
(B) 0.7
(C) 0.1
(D) 0.3
10. The rate of variation of population (N) with time
(t) represented by equation dN/dt = γ N, follows
(A) J-shaped curve
(B) S-shaped curve
(C) Z-shaped curve
(D) Parabolic curve
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