FPSC lecturer statistics bs-17

Statistics Mcqs Paper 2013

• 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 (c)
• 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