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9th Class - Math | Chapter: Statistics MCQs

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Q1) The class mark of the class 90-130 is

(A) 90

(B) 105

(D) 110

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Q2) The range of the data:
25, 81, 20, 22, 16, 6, 17,15,12, 30, 32, 10, 91, 8, 11, 20 is

(A) 10

(B) 75

(D) 26

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Q3) In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The upper limit of the class is

(A) 6

(B) 7

(D) 13

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Q4) The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The lower class-limit of the highest class is

(A) 15

(B) 30

(D) 40

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Q5) Let m be the mid-point and 1 be the lower class limit of a class in a continuous frequency distribution. The upper class limit of the class is

(A) 2m + l

(B) 2m – l

(D) m – 2l

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Q6) The class marks of a frequency distribution are given as follows:
15, 20, 25, …
The class corresponding to the class mark 15 is:

(A) 12.5 – 17.5

(B) 17.5 – 22.5

(D) 19.5 – 20.5

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Q7) In the class intervals 10-20, 20-30, the number 20 is included in

(A) 10-20

(B) 20-30

(D) none of these intervals

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Q8) A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data:
268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304,402, 318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236.
The frequency of the class 370-390 is:

(A) 0

(B) 1

(D) 5

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Q9) The ratio of sum of observations and total number of observations is called

(A) Mean

(B) Median

(D) Central tendency

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Q10) The mean of x+2, x+3, x+4 and x-2 is

(A) (x+7)/4

(B) (2x+7)/4

(D) (4x+7)/4

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Q11) The median of the data: 4, 6, 8, 9, 11 is

(A) 6

(B) 8

(D) 11

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Q12) The median of the data: 155 160 145 149 150 147 152 144 148 is

(A) 149

(B) 150

(D) 144

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Q13) The median of the data: 17, 2, 7, 27, 15, 5, 14, 8, 10, 24, 48, 10, 8, 7, 18, 28 is

(A) 10

(B) 24

(D) 8

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Q14) The mode of the given data: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is

(A) 7

(B) 9

(D) 6

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Q15) The value which appears very frequently in a data is called:

(A) Mean

(B) Median

(D) Central tendency

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Q16) The collection of information, collected for a purpose is called

(A) Mean

(B) Median

(D) Data

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Q17) The mean of the data 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 is

(A) 2

(B) 2.2

(D) 2.8

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Q18) Which of the following is not a measure of central tendency?

(A) Standard deviation

(B) Mean

(D) Mode

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Q19) A grouped frequency distribution table with classes of equal sizes using 63-72 (72 included) as one of the class is constructed for the following data:
30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44.
The number of classes in the distribution will be

(A) 9

(B) 10

(D) 12

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Q20) To draw a histogram to represent the following frequency distribution. the adjusted frequency for the class 25-45 is:

(A) 6

(B) 5

(D) 2

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Q21) The mean of five numbers is 30. If one number is excluded, their mean becomes 28. the excluded number is

(A) 28

(B) 30

(D) 38

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Q22) If \(\bar { x } \) represents the mean of n observations x₁, x₂, …, x_n, then value of \(\sum_{i=1}^{n}\left(x_{i}-\bar{x}\right)\) is

(A) -1

(B) 0

(D) n-1

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Q23) If each observation of the data is increased by 5, then their mean

(A) remains the same

(B) becomes 5 times the original mean

(D) is increased by 5

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Q24) Let \(\bar { x } \) be the mean of x₁, x₂, …, x_n and y the mean of y₁, y₂, …, y_n. If z is the mean of x₁, x₂, …. x_n, y₁, y₂, …, y_n, then z is equal to

(A) \(\bar {x}+\bar{y} \)

(B) \(\frac{\bar {x}+\bar{y}}{2}\)

(D) \(\frac{\bar {x}+\bar{y}}{2n}\)

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Q25) The median of the data
78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is

(A) 45

(B) 49.5

(D) 56

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Q26) For drawing a frequency polygon of a continous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are respectively

(A) upper limits of the classes

(B) lower limits of the classes

(D) upper limits of preceding classes

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Q27) Mode of the data
15, 14, 19, 20, 16, 15, 16, 14, 15, 18, 14, 19, 16, 17, 16 is

(A) 14

(B) 15

(D) 17

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Q28) The mean of 25 observations is 26. Out of these observations if the mean of first 13 observations is 22 and that of the last 13 observations is 30, the 13th observation is

(A) 23

(B) 26

(D) 30

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9th Class - Math | Chapter: Statistics MCQs

Q1) The class mark of the class 90-130 is

Q2) The range of the data: 25, 81, 20, 22, 16, 6, 17,15,12, 30, 32, 10, 91, 8, 11, 20 is

Q3) In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The upper limit of the class is

Q4) The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The lower class-limit of the highest class is

Q5) Let m be the mid-point and 1 be the lower class limit of a class in a continuous frequency distribution. The upper class limit of the class is

Q6) The class marks of a frequency distribution are given as follows: 15, 20, 25, … The class corresponding to the class mark 15 is:

Q7) In the class intervals 10-20, 20-30, the number 20 is included in

Q9) The ratio of sum of observations and total number of observations is called

Q10) The mean of x+2, x+3, x+4 and x-2 is

Q11) The median of the data: 4, 6, 8, 9, 11 is

Q12) The median of the data: 155 160 145 149 150 147 152 144 148 is

Q13) The median of the data: 17, 2, 7, 27, 15, 5, 14, 8, 10, 24, 48, 10, 8, 7, 18, 28 is

Q14) The mode of the given data: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is

Q15) The value which appears very frequently in a data is called:

Q16) The collection of information, collected for a purpose is called

Q17) The mean of the data 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 is

Q18) Which of the following is not a measure of central tendency?

Q20) To draw a histogram to represent the following frequency distribution. the adjusted frequency for the class 25-45 is:

Q21) The mean of five numbers is 30. If one number is excluded, their mean becomes 28. the excluded number is

Q22) If \(\bar { x } \) represents the mean of n observations x₁, x₂, …, x_n, then value of \(\sum_{i=1}^{n}\left(x_{i}-\bar{x}\right)\) is

Q23) If each observation of the data is increased by 5, then their mean

Q24) Let \(\bar { x } \) be the mean of x₁, x₂, …, x_n and y the mean of y₁, y₂, …, y_n. If z is the mean of x₁, x₂, …. x_n, y₁, y₂, …, y_n, then z is equal to

Q25) The median of the data 78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is

Q26) For drawing a frequency polygon of a continous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are respectively

Q27) Mode of the data 15, 14, 19, 20, 16, 15, 16, 14, 15, 18, 14, 19, 16, 17, 16 is

Q28) The mean of 25 observations is 26. Out of these observations if the mean of first 13 observations is 22 and that of the last 13 observations is 30, the 13th observation is

Subjects (9th Class)

Chapters (Math)