EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 62
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 37
      37 - 44
      44 - 51
      51 - 58
      58 - 65
      No. of workers
      5
      19
      24
      6
      8
  • (i)
    ₹
    47.71
  • (ii)
    ₹
    46.74
  • (iii)
    ₹
    48.71
  • (iv)
    ₹
    46.71
  • (v)
    ₹
    46.77
Question 2
2.
    • The following table shows the weights of
    • 75
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      50 - 56
      57 - 63
      64 - 70
      71 - 77
      78 - 84
      No. of persons
      19
      17
      14
      19
      6
  • (i)
    1619
    25
    kg
  • (ii)
    1621
    25
    kg
  • (iii)
    1669
    25
    kg
  • (iv)
    1644
    25
    kg
  • (v)
    324
    5
    kg
Question 3
3.
    • The following table shows the weights of
    • 88
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      50 - 58
      58 - 66
      66 - 74
      74 - 82
      82 - 90
      90 - 98
      98 - 106
      106 - 114
      No. of persons
      10
      5
      20
      9
      7
      14
      11
      12
  • (i)
    936
    11
    kg
  • (ii)
    914
    11
    kg
  • (iii)
    925
    11
    kg
  • (iv)
    915
    11
    kg
  • (v)
    916
    11
    kg
Question 4
4.
    • The daily wages of
    • 87
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 37
      38 - 45
      46 - 53
      54 - 61
      62 - 69
      No. of workers
      26
      14
      20
      11
      16
  • (i)
    ₹
    48.39
  • (ii)
    ₹
    49.39
  • (iii)
    ₹
    47.40
  • (iv)
    ₹
    47.39
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      13 - 21
      22 - 30
      31 - 39
      40 - 48
      49 - 57
      58 - 66
      67 - 75
      Frequency
      24
      20
      47
      8
      20
      46
      4
  • (i)
    7290
    169
  • (ii)
    7123
    169
  • (iii)
    7122
    169
  • (iv)
    7121
    169
  • (v)
    7459
    169
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      19 - 29
      29 - 39
      39 - 49
      49 - 59
      59 - 69
      69 - 79
      79 - 89
      Frequency
      33
      9
      32
      4
      45
      39
      6
  • (i)
    1166
    21
  • (ii)
    1126
    21
  • (iii)
    1145
    21
  • (iv)
    375
    7
  • (v)
    1124
    21
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 84
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      45 - 65
      65 - 85
      85 - 105
      105 - 125
      125 - 145
      No. of consumers
      25
      19
      13
      19
      8
  • (i)
    1825
    21
    units
  • (ii)
    87
    units
  • (iii)
    1846
    21
    units
  • (iv)
    1867
    21
    units
  • (v)
    1826
    21
    units
    Assignment Key
  •  1) (iv)
  •  2) (i)
  •  3) (ii)
  •  4) (iv)
  •  5) (iv)
  •  6) (v)
  •  7) (i)