EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 94
    • 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
      8
      12
      5
      13
      25
      24
      7
  • (i)
    ₹
    61.49
  • (ii)
    ₹
    62.49
  • (iii)
    ₹
    63.49
  • (iv)
    ₹
    61.51
  • (v)
    ₹
    61.53
Question 2
2.
    • The following table shows the weights of
    • 84
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      20 - 30
      31 - 41
      42 - 52
      53 - 63
      64 - 74
      75 - 85
      86 - 96
      97 - 107
      No. of persons
      17
      15
      8
      6
      10
      9
      11
      8
  • (i)
    1231
    21
    kg
  • (ii)
    1250
    21
    kg
  • (iii)
    410
    7
    kg
  • (iv)
    1271
    21
    kg
  • (v)
    1229
    21
    kg
Question 3
3.
    • The following table shows the weights of
    • 102
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      10 - 17
      17 - 24
      24 - 31
      31 - 38
      38 - 45
      45 - 52
      52 - 59
      59 - 66
      No. of persons
      6
      6
      15
      18
      14
      19
      15
      9
  • (i)
    1379
    34
    kg
  • (ii)
    2068
    51
    kg
  • (iii)
    4237
    102
    kg
  • (iv)
    4135
    102
    kg
  • (v)
    4339
    102
    kg
Question 4
4.
    • The daily wages of
    • 87
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      30 - 37
      38 - 45
      46 - 53
      54 - 61
      62 - 69
      70 - 77
      78 - 85
      86 - 93
      No. of workers
      9
      10
      19
      5
      6
      21
      12
      5
  • (i)
    ₹
    61.00
  • (ii)
    ₹
    62.99
  • (iii)
    ₹
    61.99
  • (iv)
    ₹
    60.99
  • (v)
    ₹
    61.01
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      11 - 18
      19 - 26
      27 - 34
      35 - 42
      43 - 50
      51 - 58
      Frequency
      26
      18
      26
      23
      48
      35
  • (i)
    38
  • (ii)
    79
    2
  • (iii)
    75
    2
  • (iv)
    77
    2
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      17 - 22
      22 - 27
      27 - 32
      32 - 37
      37 - 42
      Frequency
      44
      44
      2
      44
      49
  • (i)
    5449
    183
  • (ii)
    10897
    366
  • (iii)
    3633
    122
  • (iv)
    11629
    366
  • (v)
    11263
    366
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 82
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      51 - 61
      61 - 71
      71 - 81
      81 - 91
      91 - 101
      No. of consumers
      12
      12
      21
      20
      17
  • (i)
    3208
    41
    units
  • (ii)
    3207
    41
    units
  • (iii)
    3247
    41
    units
  • (iv)
    3206
    41
    units
  • (v)
    3288
    41
    units
    Assignment Key
  •  1) (i)
  •  2) (v)
  •  3) (iv)
  •  4) (iv)
  •  5) (iii)
  •  6) (ii)
  •  7) (iv)