Statistics And Data Analysis Questions Practice Question and Answer

Q:

Find the standard deviation of the following data (rounded off to two decimal places). 

5, 3, 4, 7 

604 0

  • 1
    1.48
    Correct
    Wrong
  • 2
    3.21
    Correct
    Wrong
  • 3
    4.12
    Correct
    Wrong
  • 4
    2.45
    Correct
    Wrong
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Answer : 1. "1.48 "

Q:

If the score of five students is 8,7,9,16,25, then their mean deviation will be.

1045 1

  • 1
    12
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    5.2
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
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Answer : 4. "6"

Q:

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

999 0

  • 1
    20
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 4. "28"

Q:

The median of a set of 11 distinct observations is 73.2. If each of the largest five observations of the set is increased by 3, then the median of the new set:

573 0

  • 1
    is 3 times that of the original set
    Correct
    Wrong
  • 2
    is increased by 3
    Correct
    Wrong
  • 3
    remains the same as that of the original set
    Correct
    Wrong
  • 4
    is decreased by 3
    Correct
    Wrong
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Answer : 3. "remains the same as that of the original set"

Q:

The mean of four different observations is 17.5. When a new observation whose value 20 is added, what will be the new mean?   

1295 0

  • 1
    18
    Correct
    Wrong
  • 2
    17.5
    Correct
    Wrong
  • 3
    19
    Correct
    Wrong
  • 4
    18.5
    Correct
    Wrong
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Answer : 1. "18"

Q:

A set of data is given. The mean of the set is 35 while the median is set as 60. Find the mode of the data.

950 0

  • 1
    25
    Correct
    Wrong
  • 2
    30
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    110
    Correct
    Wrong
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Answer : 4. "110"

Q:

Runs scored by Rohit sharma in some 3 test Matches against Pakastian are as follows 101, 126, 32, 38, 52, and 40. Find median of the given scores.

1873 0

  • 1
    46
    Correct
    Wrong
  • 2
    46.5
    Correct
    Wrong
  • 3
    50
    Correct
    Wrong
  • 4
    47
    Correct
    Wrong
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Answer : 1. "46"

Q:

What is the mode of the given data?

5, 7, 9, 7, 3, 7, 5, 7, 8, 6, 7

370 0

  • 1
    7
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 1. "7"

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