EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 75
    • 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
      25
      10
      27
      5
      8
  • (i)
    ₹
    48.82
  • (ii)
    ₹
    47.86
  • (iii)
    ₹
    49.82
  • (iv)
    ₹
    47.84
  • (v)
    ₹
    47.82
Question 2
2.
    • The following table shows the weights of
    • 61
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      40 - 45
      46 - 51
      52 - 57
      58 - 63
      64 - 69
      No. of persons
      20
      8
      20
      6
      7
  • (i)
    3157
    61
    kg
  • (ii)
    6435
    122
    kg
  • (iii)
    6313
    122
    kg
  • (iv)
    6557
    122
    kg
  • (v)
    6315
    122
    kg
Question 3
3.
    • The following table shows the weights of
    • 76
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      10 - 15
      15 - 20
      20 - 25
      25 - 30
      30 - 35
      35 - 40
      40 - 45
      No. of persons
      10
      12
      8
      11
      11
      18
      6
  • (i)
    2181
    76
    kg
  • (ii)
    2105
    76
    kg
  • (iii)
    2107
    76
    kg
  • (iv)
    1053
    38
    kg
  • (v)
    2257
    76
    kg
Question 4
4.
    • The daily wages of
    • 109
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      20 - 30
      31 - 41
      42 - 52
      53 - 63
      64 - 74
      75 - 85
      No. of workers
      12
      15
      22
      30
      12
      18
  • (i)
    ₹
    53.98
  • (ii)
    ₹
    55.96
  • (iii)
    ₹
    54.96
  • (iv)
    ₹
    53.96
  • (v)
    ₹
    53.97
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      8 - 15
      16 - 23
      24 - 31
      32 - 39
      40 - 47
      48 - 55
      56 - 63
      64 - 71
      Frequency
      9
      3
      14
      4
      36
      37
      47
      7
  • (i)
    15173
    314
  • (ii)
    14859
    314
  • (iii)
    7430
    157
  • (iv)
    14861
    314
  • (v)
    15487
    314
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      19 - 24
      24 - 29
      29 - 34
      34 - 39
      39 - 44
      Frequency
      17
      36
      25
      6
      33
  • (i)
    7859
    234
  • (ii)
    7625
    234
  • (iii)
    7391
    234
  • (iv)
    7393
    234
  • (v)
    1232
    39
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 110
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      44 - 64
      64 - 84
      84 - 104
      104 - 124
      124 - 144
      144 - 164
      164 - 184
      No. of consumers
      15
      11
      20
      13
      21
      15
      15
  • (i)
    1272
    11
    units
  • (ii)
    1283
    11
    units
  • (iii)
    1294
    11
    units
  • (iv)
    1274
    11
    units
  • (v)
    1273
    11
    units
    Assignment Key
  •  1) (v)
  •  2) (iii)
  •  3) (ii)
  •  4) (iv)
  •  5) (ii)
  •  6) (iii)
  •  7) (i)