statistics MCQs – Page 3

Practise multiple-choice questions from statistics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

statistics Mcqs

1. sample linear regression 2. normal distribution 3. presentation of data 4. statistical inference 5. measures of location 6. basic statistics 7. correlation and regression 8. sampling 9. binomial and hyper geometric probability 10. index number 11. hypothesis testing 12. measures of dispersion

41. Census reports used as a source of data is____________?
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A. secondary source

B. Organized data

C. Primary source

D. none

42. In descriptive statistics, we study:
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A. None of the above

B. How to describe the probability distribution

C. The description of decision making process

D. The methods for organizing, displaying, and describing data

43. Use of Statistics in planning is ____________?
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A. Samples

B. Useless

C. Unavoidable

D. Various Methods

44. The data collected by NADRA to issue National Identity cards are______________?
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A. un-official data

B. Official data

C. Primary data

D. Secondary data

45. According to the empirical rule, approximately what percent of the data should lie within ???
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A. 75%

B. 95%

C. 90%

D. 99.70%

46. Which of the following Measure of averages is affected by extreme (very small or very largE. values in data set?
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A. Harmonic Mean

B. Arithmetic Mean

C. Geometric Mean

D. Mode

E. Median

47. Sampling error can reduced by __________________?
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A. Decreasing the sample size

B. Increasing the sample size

C. Increasing the population

D. Non-random sampling

48. Data must be arranged either in ascending or descending order, if some wants to compute____________?
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A. Harmonic Mean

B. Mode

C. Median

D. Geometric Mean

E. Median

49. Discrete random variable is real valued function defined on a ___________ sample space?
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A. Scale

B. Discrete

C. Variable

D. Non of these

50. The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?
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A. 5

B. 2.5

C. 5.5

D. 20

E. 0

51. Non-random sampling is also called___________________?
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A. Representative sampling

B. Biased sampling

C. Non-prob.sampling

D. Less than sampling

52. Experiment in which outcomes vary from trial to trial _________________?
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A. Random experiment

B. Variable

C. Experiment

D. Non of these

53. Standard deviation is calculated from the Harmonic Mean (HM) ________________?
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A. Sometimes

B. None of these

C. Never

D. Always

54. For a symmetrical distribution approximately 68% of the cases are included between _________________?
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A. X?3S and X+3S

B. None of these

C. X?S and X+S

D. X?2S and X+2S

55. Which of the following is not an example of a discrete probability distribution ?
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A. Non of these

B. Whether or no t a home has a swimming pool in it.

C. The number of bedrooms in a house

D. The sale or purchase price of a house

56. In descriptive statistics, we study______________?
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A. None of the above

B. How to describe the probability distribution

C. The methods for organizing, displaying, and describing data

D. The description of decision making process

57. There are ____________ probability sampling?
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A. Four

B. Six

C. Seven

D. Three

58. Which of the following is impossible in sampling ?
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A. None of these

B. Destructive tests

C. To make voters lists

D. Heterogeneous data

59. Random numbers are also called__________________?
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A. Random digits

B. random Errors

C. Random experiment

D. None of these

60. Total Area under the curve in probability of density function is ?
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A. 0

B. Infinity

C. 1

D. -1

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