EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 61
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 39
      39 - 48
      48 - 57
      57 - 66
      66 - 75
      No. of workers
      6
      18
      5
      13
      19
  • (i)
    ₹
    56.60
  • (ii)
    ₹
    55.60
  • (iii)
    ₹
    57.60
  • (iv)
    ₹
    55.61
Question 2
2.
    • The following table shows the weights of
    • 67
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      20 - 26
      27 - 33
      34 - 40
      41 - 47
      48 - 54
      No. of persons
      7
      15
      19
      14
      12
  • (i)
    2544
    67
    kg
  • (ii)
    2676
    67
    kg
  • (iii)
    2543
    67
    kg
  • (iv)
    2609
    67
    kg
  • (v)
    2542
    67
    kg
Question 3
3.
    • The following table shows the weights of
    • 81
    • 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
      No. of persons
      18
      19
      5
      18
      5
      8
      8
  • (i)
    5983
    81
    kg
  • (ii)
    6064
    81
    kg
  • (iii)
    656
    9
    kg
  • (iv)
    5902
    81
    kg
  • (v)
    5903
    81
    kg
Question 4
4.
    • The daily wages of
    • 114
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      20 - 25
      26 - 31
      32 - 37
      38 - 43
      44 - 49
      50 - 55
      No. of workers
      23
      26
      30
      23
      5
      7
  • (i)
    ₹
    33.58
  • (ii)
    ₹
    33.55
  • (iii)
    ₹
    34.55
  • (iv)
    ₹
    35.55
  • (v)
    ₹
    33.61
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      1 - 10
      11 - 20
      21 - 30
      31 - 40
      41 - 50
      51 - 60
      61 - 70
      Frequency
      23
      46
      30
      1
      41
      8
      1
  • (i)
    863
    30
  • (ii)
    134
    5
  • (iii)
    803
    30
  • (iv)
    161
    6
  • (v)
    833
    30
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      12 - 20
      20 - 28
      28 - 36
      36 - 44
      44 - 52
      52 - 60
      60 - 68
      Frequency
      18
      31
      32
      6
      27
      13
      12
  • (i)
    5366
    139
  • (ii)
    5089
    139
  • (iii)
    5088
    139
  • (iv)
    5090
    139
  • (v)
    5227
    139
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 93
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      76 - 96
      96 - 116
      116 - 136
      136 - 156
      156 - 176
      No. of consumers
      23
      24
      15
      18
      13
  • (i)
    3733
    31
    units
  • (ii)
    11200
    93
    units
  • (iii)
    11384
    93
    units
  • (iv)
    11198
    93
    units
  • (v)
    11291
    93
    units
    Assignment Key
  •  1) (ii)
  •  2) (v)
  •  3) (iv)
  •  4) (ii)
  •  5) (iii)
  •  6) (iii)
  •  7) (iv)