CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade IX - Statistics
Question 1
1.
Which of the following are continuous variables?
a)
Number of workers in a factory.
b)
Heights of children in a class.
c)
Wages of workers in a factory.
d)
Weights of persons in a group.
e)
Number of members in a family.
  • {a,b,c}
  • {e,c}
  • {b,c,d}
  • {a,b}
  • {a,e,d}
Question 2
2.
Find the median of first 8 whole numbers.
  • 7
    2
  • 4
  • 13
    4
  • 5
    2
  • 9
    2
Question 3
3.
    • Given class interval
    • 47
    • -
    • 57
    • in exclusive form, its
    • upper limit is
  • 54
  • 58
  • 56
  • 60
  • 57
Question 4
4.
Find the median of all prime numbers between 50 and 70.
  • 63
  • 60
  • 61
  • 58
  • 59
Question 5
5.
    • Ages of 12 students (in years) are given below. Find the mode age.
      • 14
      • 11
      • 15
      • 13
      • 10
      • 11
      • 15
      • 12
      • 10
      • 13
      • 14
      • 10
  • 8
    years
  • 11
    years
  • 10
    years
  • 9
    years
  • 12
    years
Question 6
6.
Following bar graph gives the average temperature of a place during a week. Find the day that has maximum temperature.
  • Tues.
  • Mon.
  • Sun.
  • Fri.
  • Sat.
Question 7
7.
    • Rainfall of 20 days are given below. Find the median.
    • Rainfall (in mm)
      5
      6
      7
      8
      9
      11
      12
      13
      14
      15
      No. of days
      1
      2
      6
      1
      1
      1
      1
      3
      3
      1
  • 9
    mm
  • 21
    2
    mm
  • 17
    2
    mm
  • 19
    2
    mm
Question 8
8.
    • Rainfall of 118 days (in mm) are given below.
    • Identify the class interval table for the given frequency polygon.
  • Rainfall (in mm)
    5 - 15
    15 - 25
    25 - 35
    35 - 45
    45 - 55
    No. of days
    30
    34
    18
    19
    17
  • Rainfall (in mm)
    5 - 15
    15 - 25
    25 - 35
    35 - 45
    45 - 55
    No. of days
    30
    15
    18
    19
    34
  • Rainfall (in mm)
    5 - 15
    15 - 25
    25 - 35
    35 - 45
    45 - 55
    No. of days
    30
    17
    20
    19
    34
  • Rainfall (in mm)
    5 - 15
    15 - 25
    25 - 35
    35 - 45
    45 - 55
    No. of days
    30
    18
    17
    19
    34
  • Rainfall (in mm)
    5 - 15
    15 - 25
    25 - 35
    35 - 45
    45 - 55
    No. of days
    30
    17
    18
    19
    34
Question 9
9.
Find the mean of first 8 multiples of 4.
  • 18
  • 19
  • 17
  • 20
  • 16
Question 10
10.
Which of the following tables represent the given histogram with varying base widths
  • Temperature (in degree)
    35 - 45
    45 - 55
    55 - 65
    65 - 75
    75 - 85
    85 - 105
    No. of days
    14
    15
    6
    8
    10
    6
  • Temperature (in degree)
    35 - 45
    45 - 55
    55 - 65
    65 - 75
    75 - 85
    85 - 105
    No. of days
    14
    15
    6
    4
    10
    12
  • Temperature (in degree)
    35 - 45
    45 - 55
    55 - 65
    65 - 75
    75 - 85
    85 - 105
    No. of days
    14
    15
    6
    8
    10
    12
  • Temperature (in degree)
    35 - 45
    45 - 55
    55 - 65
    65 - 75
    75 - 85
    85 - 105
    No. of days
    14
    15
    6
    3
    10
    6
  • Temperature (in degree)
    35 - 45
    45 - 55
    55 - 65
    65 - 75
    75 - 85
    85 - 105
    No. of days
    14
    15
    4
    8
    10
    12