EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 112
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      20 - 30
      30 - 40
      40 - 50
      50 - 60
      60 - 70
      70 - 80
      80 - 90
      No. of workers
      30
      10
      9
      7
      19
      21
      16
  • (i)
    ₹
    54.14
  • (ii)
    ₹
    54.11
  • (iii)
    ₹
    54.18
  • (iv)
    ₹
    55.11
  • (v)
    ₹
    56.11
Question 2
2.
    • The following table shows the weights of
    • 74
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      40 - 50
      51 - 61
      62 - 72
      73 - 83
      84 - 94
      95 - 105
      No. of persons
      10
      10
      18
      8
      18
      10
  • (i)
    2721
    37
    kg
  • (ii)
    2722
    37
    kg
  • (iii)
    2795
    37
    kg
  • (iv)
    2758
    37
    kg
  • (v)
    2723
    37
    kg
Question 3
3.
    • The following table shows the weights of
    • 106
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      30 - 39
      39 - 48
      48 - 57
      57 - 66
      66 - 75
      75 - 84
      84 - 93
      No. of persons
      11
      8
      18
      17
      17
      18
      17
  • (i)
    3479
    53
    kg
  • (ii)
    3428
    53
    kg
  • (iii)
    3427
    53
    kg
  • (iv)
    3426
    53
    kg
  • (v)
    3532
    53
    kg
Question 4
4.
    • The daily wages of
    • 102
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 38
      39 - 47
      48 - 56
      57 - 65
      66 - 74
      No. of workers
      14
      29
      27
      22
      10
  • (i)
    ₹
    52.68
  • (ii)
    ₹
    50.68
  • (iii)
    ₹
    50.74
  • (iv)
    ₹
    50.71
  • (v)
    ₹
    51.68
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      14 - 22
      23 - 31
      32 - 40
      41 - 49
      50 - 58
      59 - 67
      Frequency
      43
      39
      1
      1
      5
      16
  • (i)
    1097
    35
  • (ii)
    152
    5
  • (iii)
    1132
    35
  • (iv)
    1063
    35
  • (v)
    1062
    35
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      18 - 24
      24 - 30
      30 - 36
      36 - 42
      42 - 48
      48 - 54
      Frequency
      37
      22
      18
      2
      31
      25
  • (i)
    1661
    45
  • (ii)
    524
    15
  • (iii)
    1616
    45
  • (iv)
    1573
    45
  • (v)
    1571
    45
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 74
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      42 - 62
      62 - 82
      82 - 102
      102 - 122
      122 - 142
      142 - 162
      No. of consumers
      5
      16
      17
      10
      9
      17
  • (i)
    3934
    37
    units
  • (ii)
    3971
    37
    units
  • (iii)
    3936
    37
    units
  • (iv)
    3935
    37
    units
  • (v)
    4008
    37
    units
    Assignment Key
  •  1) (ii)
  •  2) (i)
  •  3) (iv)
  •  4) (ii)
  •  5) (v)
  •  6) (v)
  •  7) (i)