ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VIII - Statistics
Question 1
1.
    • Heights of 30 plants are given below. Find the median.
    • Height (in cm)
      62
      69
      75
      84
      85
      89
      91
      No. of plants
      6
      4
      3
      7
      3
      3
      4
  • 82
    cm
  • 84
    cm
  • 86
    cm
  • 83
    cm
  • 85
    cm
Question 2
2.
    • Given class interval
    • 20
    • -
    • 29
    • in exclusive form, its
    • mid value is
  • 47
    2
  • 51
    2
  • 97
    4
  • 49
    2
  • 25
Question 3
3.
    • Weights of 13 students (in kg) are given below. Find the mode weight.
      • 56
      • 59
      • 41
      • 60
      • 42
      • 44
      • 55
      • 44
      • 54
      • 40
      • 49
      • 51
      • 44
  • 45
    kg
  • 43
    kg
  • 46
    kg
  • 44
    kg
  • 42
    kg
Question 4
4.
    • Ages of 12 students (in years) are given below. Find the mean age.
      • 15
      • 11
      • 13
      • 12
      • 10
      • 14
      • 15
      • 15
      • 11
      • 11
      • 10
      • 12
  • 161
    12
    years
  • 149
    12
    years
  • 151
    12
    years
  • 25
    2
    years
  • 173
    12
    years
Question 5
5.
    • If the mean of
    • 4
    • samples is
    • 23
      1
      4
    • ,
    • what is the new mean if
    • 9
    • is added to each number.
  • 129
    4
  • 193
    6
  • 65
    2
  • 131
    4
  • 127
    4
Question 6
6.
    • The scores obtained by 10 students in a test are given below. Find the mode.
      • 6
      • 10
      • 17
      • 4
      • 12
      • 5
      • 7
      • 16
      • 15
      • 4
  • 4
  • 13
  • 10
    2
    9
  • 10
  • 17
Question 7
7.
    • The class boundaries of 46 - 54 which is in inclusive form are
  • 45
    -
    55
  • 45.5
    -
    54.5
  • 45
    -
    54.5
  • 46
    -
    54
  • 45.5
    -
    55
Question 8
8.
The arithmetic mean of a + 2, a, and a - 2 is
  • a + 2
  • a
  • 3a
  • a - 2
Question 9
9.
    • The class size used in the below table is
    • Class-Interval
      20 - 28
      28 - 36
      36 - 44
      44 - 52
      52 - 60
      Frequency
      4
      3
      9
      4
      29
  • 9
  • 7
  • 10
  • 5
  • 8
Question 10
10.
    • The mean of
    • 5
    • numbers is
    • 11
      1
      5
    • .
    • Upon
    • excluding
    • one number,
    • the mean becomes
    • 11
      1
      2
    • .
    • Find the
    • excluded
    • number.
  • 11
  • 8
  • 13
  • 9
  • 10