Gokhale sample paper 3 discussion

Posted by neha:) on Jun 07, 2014; 7:56am
URL: http://discussion-forum.276.s1.nabble.com/Gokhale-sample-paper-3-discussion-tp7591759.html

Section C:
25. In a statistical test for the equality of a mean, such as H0 : µ = 10, if α = 0.05,
 a) 95% of the time we will make an incorrect inference
 b) 5% of the time we will say that there is a real difference when there is no difference
 c) 5% of the time we will say that there is no real difference when there is a difference
 d) 95% of the time the null hypothesis will be correct

26. Newton’s law of gravity is an example for
 a) Stochastic relationship
 b) Statistical relationship
 c) Deterministic phenomena
 d) Comparing economics to science

15. If the correlation between two variables is -1 and 0, then the covariance between them is
 a) Positive b) Negative c) Zero d) None of all
 
16. If we sum all the probabilities of the conditional events in which the event A occurs which
under statistical dependence, the result is
 a) The marginal probability of A.  b) The joint probability of A.
 c) The conditional probability of A. d) None of these.

11. In a Bernolli experiment the probability of success is 0.2 and the number of trials is 7.
The approximate probability of getting one success is
 a) 0.294  b) 0.367  c) 0.425 d) 0.550

 
9. Five Men and three women are to sit around a circular table. If they chose their positions at a
random. What is the probability that no two women are adjacent?
 a) 1/7 b) 1/9 c) 2/7  d) 2/9

6. Find no of ways in which two books on economics and three books on accountancy can be
arranged in a line.
 a) 60  b) 120 c) 24 d) 40