FPSC lecturer statistics bs-17

Statistics Mcqs Paper 2013

1. Two mutually exclusive events are also:

(a) Dependent events

(b) Independent events

(c) Exhaustive events

(d) None of these

2. In which definition of probability, the condition of mutually exclusive and equally likely events is imposed?

(a) Subjective approach

(b) Relative frequency

(c) Classical definition

(d) None of these

3. In Poisson distribution:

(a) Mean > Variance

(b) Mean < Variance

(c) Mean Variance

(d) None of these

4. When sample size n becomes larger and larger and sample estimate tends to the respective population parameter, this property of estimators is called:

(a) Unbiasedness

(b) Consistency

(c) Reliability

(d) None of these

5. If the voting preference of 100,000 registered voters are to study, what kind of sampling should be used?

(a) Simple Random Sampling

(b) Quota Sampling

(c) Stratified Random Sampling

(d) None of these

6. If the sampling frame not available then which of the sampling technique could be adopted with ease:

(a) Simple Random Sampling

(b) Stratified Random Sampling

(c) Cluster Random Sampling

(d) None of these

7. The complete list of the sampling units is called:

(a) Sampling Frame

(b) Unit List

(c) Sample Space

(d) None of these

8. A cricket captain wins the toss for three consecutive matches. What is the probability that he will call correctly for the fourth match?

(a) 1/2

(b) 1/4

(c) 1/8

(d) None of these

9. If X has binomial distribution with parameter p and n then the variance of X is:

(a) n pq
(b) np

11. Which of the following statement is true for Normal distribution?

(a) It is skewed to the right

(b) It has always a mean of zero and a standard deviation of one
(c) Its mean, median and mode are equal

(d) None of these

12. Which of the following statement is true?

(a) The slope coefficient in regression and the correlation coefficient always have the same sign
(b) A regression line always passes through origin

(c) The correlation coefficient can exceed than 1
(d) None of these

13. Testing of hypotheses is a phase to check the validity of:

(a) Population parameter

(b) Sample estimate

(c) Population

(d) None of these

14. Any set of outcomes of a random experiments is called:

(a) Event

(b) Event space

(c) Sample points

(d) None of these

15. When a difference between two groups is statistically significant this means that:

(a) The difference is statistically real but of little practical significance
(b) The difference is probably the result of sampling variation
(c) The difference is not likely to be due to chance variation

(d) None of these

16. The degree of freedom for two independent samples will be based on:

17. As the sample size increases:

(a) The standard deviation of the population decreases

(b) The population means increases
(c) The standard error of the mean decreases

(d) None of these

18. With a lower level of significance, the probability of rejecting a true null hypothesis:

(a) Remains same

(b) Increases

(c) Decrease

(d) None of these

19. Which one is NOT the characteristic of a random experiment:

(a) It has at least two outcomes

(b) The number of all possible outcomes are not known in advance
(c) It can be repeated any number of times under similar conditions

(d) None of these

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