EduSahara™ Assignment
Name : Mean of Grouped Data
Chapter : Statistics
Grade : ICSE Grade VIII
License : Non Commercial Use
Question 1
1.
    • The daily wages of
    • 82
    • workers in a factory are given below.
    • Find the
    • mean wage.
    • Wage (in rupees)
      20 - 30
      30 - 40
      40 - 50
      50 - 60
      60 - 70
      No. of workers
      23
      19
      11
      20
      9
  • (i)
    ₹
    41.71
  • (ii)
    ₹
    42.71
  • (iii)
    ₹
    41.76
  • (iv)
    ₹
    41.73
  • (v)
    ₹
    43.71
Question 2
2.
    • The following table shows the weights of
    • 83
    • 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
      No. of persons
      14
      5
      13
      7
      18
      13
      13
  • (i)
    3779
    83
    kg
  • (ii)
    3944
    83
    kg
  • (iii)
    3780
    83
    kg
  • (iv)
    3778
    83
    kg
  • (v)
    3861
    83
    kg
Question 3
3.
    • The following table shows the weights of
    • 92
    • persons in a group.
    • Find the
    • mean weight.
    • Weight (in kg)
      30 - 37
      37 - 44
      44 - 51
      51 - 58
      58 - 65
      65 - 72
      72 - 79
      79 - 86
      No. of persons
      6
      18
      11
      5
      14
      10
      11
      17
  • (i)
    1376
    23
    kg
  • (ii)
    1422
    23
    kg
  • (iii)
    1377
    23
    kg
  • (iv)
    1378
    23
    kg
  • (v)
    1399
    23
    kg
Question 4
4.
    • The daily wages of
    • 172
    • 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
      8
      22
      9
      22
      29
      24
      28
      30
  • (i)
    ₹
    67.01
  • (ii)
    ₹
    68.99
  • (iii)
    ₹
    67.99
  • (iv)
    ₹
    67.00
  • (v)
    ₹
    66.99
Question 5
5.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      9 - 17
      18 - 26
      27 - 35
      36 - 44
      45 - 53
      54 - 62
      63 - 71
      Frequency
      16
      18
      13
      46
      8
      40
      40
  • (i)
    8241
    181
  • (ii)
    8240
    181
  • (iii)
    8239
    181
  • (iv)
    8601
    181
  • (v)
    8420
    181
Question 6
6.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      19 - 29
      29 - 39
      39 - 49
      49 - 59
      59 - 69
      Frequency
      41
      43
      34
      41
      46
  • (i)
    1822
    41
  • (ii)
    1861
    41
  • (iii)
    1902
    41
  • (iv)
    1821
    41
  • (v)
    1820
    41
Question 7
7.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 98
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      45 - 65
      65 - 85
      85 - 105
      105 - 125
      125 - 145
      145 - 165
      No. of consumers
      21
      14
      22
      12
      22
      7
  • (i)
    709
    7
    units
  • (ii)
    696
    7
    units
  • (iii)
    697
    7
    units
  • (iv)
    695
    7
    units
  • (v)
    702
    7
    units
    Assignment Key
  •  1) (i)
  •  2) (iv)
  •  3) (i)
  •  4) (v)
  •  5) (iii)
  •  6) (v)
  •  7) (iv)