Conceptual Doubts from Q 21-60-DSE 2011

Posted by Erika on May 28, 2013; 2:52pm
URL: http://discussion-forum.276.s1.nabble.com/Conceptual-Doubts-from-Q-21-60-DSE-2011-tp7581391.html

covering Q- 21 to 40 for now:

Q22. (i) is false as -1=/ 1=/ 0
           but for (ii) statement if we take x=5 (or any other real no.) 5 =/ -5...shouldnt ii also be false?

Q23. do we choose ans (c) b < 2 because when we shift sides of 4 in given eqn, we get:
        4y=x^2 (of the form: x^2=4py) ...which gives x^2 = (2)^2 * y. so b< 2 for origin. kindly confirm if this                        logic is right or wrong.

Q25. if x= 0 or not, but belongs to Q, it should be continuous ...why are we choosing option a?

Q29. I read the previously posted ans that the empty set and society are the two sets which would belong to club and tribe. but empty set is 'empty' and society is the universal set, so how are both in a club and tribe?

Q31, 32 How to go about this question?

Q 33, 34 Which formula of probability would be applicable here?

Q 36 how to find probability maximising allocations? 50 R and 50 G balls optimally distributed in 2 bags. maximise probability of picking Green is to be maximised.  

Q 37. Why do we choose option b? what makes a coefficient determinable and others non-determinable in OLS estimation?

Q 39. Are we saying it is upwardly biased because the difference between the proposed and estimated eqn is a2L (which is not present in estimated), so it pulls the regression upwards??

Q 40. Again, similar doubt. objective is to maximise score in three maximum chances. How do we cal his score for a retest?

Thanks a lot in case you're able to help!

Regards.