Kerala PSC Previous Years Question Paper & Answer
Page:12
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Statistician' And exam conducted in the year 2023. And Question paper code was '021/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
Question57:-Ratio of squares of two independent standard normal variate is
A:-t distribution with 1 degrees of freedom
B:-F distribution with (1, 1) degrees of freedom
C:-Standard Normal distribution
D:-x2 distribution with 1 degree of freedom
Correct Answer:- Option-B
Question58:-Suppose x:, x. and x; are three independent standard normal variates.
1 + 2 + 23
/>2 + 2 + 2
77171 717 क * 24% j
A:-N (0, 3)
B:-x2 distribution with 3 degrees of freedom
C:-F distribution with (1, 1) degrees of freedom
D:-t distribution with 3 degrees of freedom
Correct Answer:- Option-D
Question59:-The mark of students of a class is normally distributed with mean 35
and standard deviation 5. The probability of a student mark between 25 and 45 is
A:-0.4772
B:-0.0228
C:-0.9544
D:-0.0456
Correct Answer:- Option-C
Question60:-The coefficient of variation of Poisson distribution with mean 16 is
A:-25%
B:-50%
C:-100%
D:-75%
Correct Answer:- Option-A
4 1 0
| 3 1
Question61:-Let X 0€ ४३ ([4, 2) with 2 = 10 0 2IWhich of the following statements
is/are true ?
(i) x. and x, are independent
(ii) ×× and x. are not independent
(iii) (2, x2 ) and xs are independent
(iv) (%, %2 ) and x; are not independent
A:-Only (i and iii)
B:-Only (i and iv)
C:-Only (ii and iii)
D:-Only (ii and iv)