EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 114
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 38
      38 - 46
      46 - 54
      54 - 62
      62 - 70
      70 - 78
      78 - 86
      No. of workers
      14
      22
      10
      25
      5
      16
      22
  • (i)
    ₹
    58.51
  • (ii)
    ₹
    58.53
  • (iii)
    ₹
    60.49
  • (iv)
    ₹
    58.49
  • (v)
    ₹
    59.49
Question 2
2.
    • The following table shows the weights of
    • 102
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      20 - 26
      27 - 33
      34 - 40
      41 - 47
      48 - 54
      55 - 61
      62 - 68
      69 - 75
      No. of persons
      7
      19
      15
      16
      8
      20
      5
      12
  • (i)
    2374
    51
    kg
  • (ii)
    1583
    34
    kg
  • (iii)
    4951
    102
    kg
  • (iv)
    4747
    102
    kg
  • (v)
    4849
    102
    kg
Question 3
3.
    • The following table shows the weights of
    • 59
    • 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
      8
      14
      7
      7
      5
      6
      5
      7
  • (i)
    4612
    59
    kg
  • (ii)
    4611
    59
    kg
  • (iii)
    4728
    59
    kg
  • (iv)
    4610
    59
    kg
  • (v)
    4669
    59
    kg
Question 4
4.
    • The daily wages of
    • 134
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 36
      37 - 43
      44 - 50
      51 - 57
      58 - 64
      65 - 71
      No. of workers
      26
      11
      26
      28
      23
      20
  • (i)
    ₹
    50.72
  • (ii)
    ₹
    50.71
  • (iii)
    ₹
    51.71
  • (iv)
    ₹
    52.71
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      3 - 10
      11 - 18
      19 - 26
      27 - 34
      35 - 42
      43 - 50
      51 - 58
      59 - 66
      Frequency
      10
      8
      11
      11
      35
      7
      15
      4
  • (i)
    7413
    202
  • (ii)
    7211
    202
  • (iii)
    7009
    202
  • (iv)
    3505
    101
  • (v)
    7011
    202
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      14 - 24
      24 - 34
      34 - 44
      44 - 54
      54 - 64
      64 - 74
      Frequency
      47
      46
      42
      11
      38
      43
  • (i)
    10067
    227
  • (ii)
    9614
    227
  • (iii)
    9840
    227
  • (iv)
    9613
    227
  • (v)
    9615
    227
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 66
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      72 - 82
      82 - 92
      92 - 102
      102 - 112
      112 - 122
      No. of consumers
      5
      12
      21
      5
      23
  • (i)
    3412
    33
    units
  • (ii)
    3346
    33
    units
  • (iii)
    3347
    33
    units
  • (iv)
    3379
    33
    units
  • (v)
    1116
    11
    units
    Assignment Key
  •  1) (iv)
  •  2) (iv)
  •  3) (iv)
  •  4) (ii)
  •  5) (iii)
  •  6) (iv)
  •  7) (ii)