ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VIII - Statistics
Question 1
1.
Which of the following are discontinuous variables?
a)
Heights of children in a class.
b)
Weights of persons in a group.
c)
Wages of workers in a factory.
d)
Number of workers in a factory.
e)
Number of members in a family.
  • {a,d}
  • {c,a,d}
  • {b,e,d}
  • {d,e}
  • {b,e}
Question 2
2.
    • Heights of 20 plants are given below. Find the mean.
    • Height (in cm)
      54
      57
      59
      61
      77
      80
      86
      87
      93
      No. of plants
      4
      2
      2
      2
      4
      2
      1
      1
      2
  • 1397
    20
    cm
  • 1399
    20
    cm
  • 699
    10
    cm
  • 1417
    20
    cm
  • 1437
    20
    cm
Question 3
3.
    • Scores of 25 students are given below. Find the median.
    • Score
      70
      71
      75
      76
      79
      85
      87
      88
      No. of students
      4
      1
      5
      3
      5
      3
      1
      3
  • 78
  • 74
  • 76
  • 75
  • 77
Question 4
4.
    • Heights of 14 students (in cm) are given below. Find the median height.
      • 127
      • 153
      • 158
      • 138
      • 163
      • 149
      • 130
      • 155
      • 126
      • 168
      • 170
      • 146
      • 162
      • 135
  • 152
    cm
  • 149
    cm
  • 153
    cm
  • 151
    cm
  • 150
    cm
Question 5
5.
Which of the following class intervals are in exclusive form?
a)
12 - 19 , 20 - 27 , 28 - 35,...
b)
36 - 43 , 44 - 51 , 52 - 59,...
c)
11.5 - 19.5 , 19.5 - 27.5 , 27.5 - 35.5...
d)
12 - 19 , 19 - 26 , 26 - 33,...
e)
33 - 40 , 40 - 47 , 47 - 54...
  • {b,d}
  • {a,b,e}
  • {c,d,e}
  • {a,c,d}
  • {a,c}
Question 6
6.
There are certain creatures in a zoo. Find the type of creature that has minimum presense in the zoo.
  • Beast animals
  • Domestic animals
  • Birds
  • Wild animals
  • Reptiles
Question 7
7.
    • The true lower limit and true upper limit of the class with frequency x is
    • Class-Interval
      Frequency
      40 - 46
      22
      46 - 52
      x
      52 - 58
      21
      58 - 64
      7
      64 - 70
      18
  • 45.5
    -
    52.5
  • 46
    -
    52.5
  • 46
    -
    52
  • 45.5
    -
    52
  • 46.5
    -
    51.5
Question 8
8.
If the length of the class is 9, then the number of class intervals needed to represent data with range 50 is
  • 9
  • 4
  • 6
  • 5
  • 7
Question 9
9.
    • Weights of 11 students (in kg) are given below. Find the mean weight.
      • 40
      • 57
      • 44
      • 60
      • 40
      • 46
      • 58
      • 40
      • 44
      • 51
      • 44
  • 546
    11
    kg
  • 526
    11
    kg
  • 524
    11
    kg
  • 525
    11
    kg
  • 535
    11
    kg
Question 10
10.
    • Weights of 15 students (in kg) are given below. Find the mode weight.
      • 60
      • 58
      • 40
      • 45
      • 44
      • 51
      • 43
      • 42
      • 54
      • 59
      • 49
      • 55
      • 47
      • 59
      • 59
  • 59
    kg
  • 58
    kg
  • 60
    kg
  • 61
    kg
  • 57
    kg