EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 130
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      20 - 26
      26 - 32
      32 - 38
      38 - 44
      44 - 50
      50 - 56
      56 - 62
      62 - 68
      No. of workers
      14
      6
      28
      8
      20
      9
      17
      28
  • (i)
    ₹
    46.51
  • (ii)
    ₹
    48.49
  • (iii)
    ₹
    46.52
  • (iv)
    ₹
    47.49
  • (v)
    ₹
    46.49
Question 2
2.
    • The following table shows the weights of
    • 101
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      40 - 48
      49 - 57
      58 - 66
      67 - 75
      76 - 84
      85 - 93
      94 - 102
      No. of persons
      17
      14
      10
      17
      6
      18
      19
  • (i)
    7362
    101
    kg
  • (ii)
    7463
    101
    kg
  • (iii)
    7261
    101
    kg
  • (iv)
    7262
    101
    kg
  • (v)
    7263
    101
    kg
Question 3
3.
    • The following table shows the weights of
    • 105
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      50 - 60
      60 - 70
      70 - 80
      80 - 90
      90 - 100
      100 - 110
      110 - 120
      120 - 130
      No. of persons
      9
      11
      6
      18
      10
      20
      20
      11
  • (i)
    661
    7
    kg
  • (ii)
    663
    7
    kg
  • (iii)
    675
    7
    kg
  • (iv)
    668
    7
    kg
  • (v)
    662
    7
    kg
Question 4
4.
    • The daily wages of
    • 133
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 38
      39 - 47
      48 - 56
      57 - 65
      66 - 74
      75 - 83
      84 - 92
      93 - 101
      No. of workers
      19
      20
      22
      9
      26
      10
      6
      21
  • (i)
    ₹
    62.98
  • (ii)
    ₹
    63.96
  • (iii)
    ₹
    62.96
  • (iv)
    ₹
    62.97
  • (v)
    ₹
    64.96
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      5 - 13
      14 - 22
      23 - 31
      32 - 40
      41 - 49
      Frequency
      31
      25
      29
      39
      24
  • (i)
    28
  • (ii)
    25
  • (iii)
    29
  • (iv)
    27
  • (v)
    26
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      19 - 25
      25 - 31
      31 - 37
      37 - 43
      43 - 49
      49 - 55
      55 - 61
      61 - 67
      Frequency
      47
      16
      38
      31
      21
      7
      18
      28
  • (i)
    4193
    103
  • (ii)
    4092
    103
  • (iii)
    4296
    103
  • (iv)
    4091
    103
  • (v)
    4090
    103
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 86
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      57 - 77
      77 - 97
      97 - 117
      117 - 137
      137 - 157
      No. of consumers
      21
      10
      24
      11
      20
  • (i)
    4677
    43
    units
  • (ii)
    4592
    43
    units
  • (iii)
    4593
    43
    units
  • (iv)
    4591
    43
    units
  • (v)
    4634
    43
    units
    Assignment Key
  •  1) (v)
  •  2) (iii)
  •  3) (i)
  •  4) (iii)
  •  5) (iv)
  •  6) (v)
  •  7) (iv)