basic statistics MCQs – Page 4

Practise focused basic statistics questions with marked answers for exam preparation and subject revision.

basic statistics Mcqs

61. The average monthly production of a factory for the first 8 months is 2,500 units, and for the next 4 months the production was 1,200 units. The average monthly production of the year will be_____________?
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A. 4021.12 units

B. 5031.10 units

C. 3012.11 units

D. 2066.55 units

62. If X and Y are independent then SD (X ? Y) is________________?
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A. SD(X)?SD(Y)

B. Var(X)+Var(Y)????????????????

C. If Y=?8X ? 5 and SD of X is 3, then SD of Y is

D. SD(X)+SD(Y)

E. SD(X)+SD(Y)???????????????

63. If the standard deviation of a population is 9, the population variance is_____________?
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A. 21

B. 81

C. 9

D. 3

64. The weights of students in a college/school is a___________?
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A. None of these

B. Continuous Variable

C. Qualitative Variable

D. Discrete Variable

65. The data collected by NADRA to issue National Identity cards are______________?
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A. Official data

B. Primary data

C. Secondary data

D. un-official data

66. Given the N values in a series, the geometric mean is______________?
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A. The square root of the product of N values

B. The fourth root of the product of N values

C. The Nth root of the product of N values

D. The third root of the product of N values

67. In a distribution of 10, 20, 30, 40, 50, the x is 30, the sum of deviations from x will be:________?
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A. 30

B. 15

C. 60

D. Zero

68. The middle value of an ordered array of numbers is the____________?
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A. Mean

B. Median

C. Mid Point

D. Mode

69. According to the empirical rule, approximately what percent of the data should lie within ???
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A. 95%

B. 90%

C. 75%

D. 99.70%

70. A contractor employs 20 male, 15 female and 5 children in his factory. Male wages are Rs. 10 per day, female Rs. 8 per day, and children Rs. 3 per day. The weighted x of wages paid per day will be_____________?
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A. 10.63

B. 3.86

C. 9.21

D. 8.37

71. Village Patwari collecting the data about cotton crops is the example of_____________?
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A. Constant

B. Primary data

C. Secondary data

D. variable

72. Statistics Laws are true________________?
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A. In each case

B. Average

C. Facts

D. Field

73. Life of a T.V picture tube is a:___________?
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A. Qualitative variable

B. Constant

C. Continuous variable

D. Discrete variable

74. In statistics, conducting a survey means_____________?
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A. Drawing graphs and pictures

B. Making mathematical calculations

C. None of the above

D. Collecting information from elements

75. The number of accidents in a city during 2012 is____________?
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A. Constant

B. Continuous variable

C. Discrete variable

D. Qualitative variable

76. The calculation of mean and variance is based on______________?
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A. Extreme values only

B. All values

C. Small values only

D. Large values only

77. The height of a student is 60 inches. This is an example of________________?
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A. Qualitative data

B. Discrete data

C. Categorical data

D. Continuous data

78. Which of these represent qualitative data______________?
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A. Liking or disliking of (500) persons of a product

B. Height of a student

C. Income of a government servant in a city

D. Yield from a wheat plot

79. Which of the following is not based on all the observations ?
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A. Geometric Mean

B. Mode

C. Weighted Mean

D. Arithmetic Mean

E. Harmonic Mean

80. The Harmonic Mean of any two numbers is________________?
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A. a+b

B. ab???

C. a+b2

D. 2aba+b

Showing 61 to 80 of 172 mcqs