CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade IX - Statistics
Question 1
1.
Find the median of all the factors of 30.
  • 9
    2
  • 21
    4
  • 6
  • 11
    2
  • 13
    2
Question 2
2.
    • Rainfall of 204 days (in mm) are given below.
    • Identify the class interval table for the given histogram.
  • Rainfall (in mm)
    14 - 22
    23 - 31
    32 - 40
    41 - 49
    50 - 58
    59 - 67
    68 - 76
    No. of days
    44
    27
    41
    22
    10
    10
    50
  • Rainfall (in mm)
    14 - 22
    23 - 31
    32 - 40
    41 - 49
    50 - 58
    59 - 67
    68 - 76
    No. of days
    44
    50
    41
    25
    10
    10
    27
  • Rainfall (in mm)
    14 - 22
    23 - 31
    32 - 40
    41 - 49
    50 - 58
    59 - 67
    68 - 76
    No. of days
    44
    50
    41
    22
    10
    10
    27
  • Rainfall (in mm)
    14 - 22
    23 - 31
    32 - 40
    41 - 49
    50 - 58
    59 - 67
    68 - 76
    No. of days
    44
    50
    46
    22
    10
    10
    27
  • Rainfall (in mm)
    14 - 22
    23 - 31
    32 - 40
    41 - 49
    50 - 58
    59 - 67
    68 - 76
    No. of days
    44
    41
    50
    22
    10
    10
    27
Question 3
3.
    • The mean of
    • 6
    • numbers is
    • 11
      2
      3
    • .
    • Upon
    • adding
    • one number,
    • the mean becomes
    • 12
      4
      7
    • .
    • Find the
    • included
    • number.
  • 15
  • 19
  • 17
  • 21
  • 18
Question 4
4.
    • Given frequency polygon showing the number of heart patients at various age groups, identify the class interval table.
  • Age (in years)
    45 - 51
    52 - 58
    59 - 65
    66 - 72
    73 - 79
    80 - 86
    87 - 93
    No. of heart patients
    24
    14
    15
    16
    25
    29
    27
  • Age (in years)
    45 - 51
    52 - 58
    59 - 65
    66 - 72
    73 - 79
    80 - 86
    87 - 93
    No. of heart patients
    24
    15
    14
    16
    25
    29
    27
  • Age (in years)
    45 - 51
    52 - 58
    59 - 65
    66 - 72
    73 - 79
    80 - 86
    87 - 93
    No. of heart patients
    24
    15
    19
    16
    25
    29
    27
  • Age (in years)
    45 - 51
    52 - 58
    59 - 65
    66 - 72
    73 - 79
    80 - 86
    87 - 93
    No. of heart patients
    24
    15
    14
    19
    25
    29
    27
  • Age (in years)
    45 - 51
    52 - 58
    59 - 65
    66 - 72
    73 - 79
    80 - 86
    87 - 93
    No. of heart patients
    24
    27
    14
    16
    25
    29
    15
Question 5
5.
Which of the following class intervals are in inclusive form?
a)
46 - 52 , 53 - 59 , 60 - 66,...
b)
25 - 31 , 32 - 38 , 39 - 45,...
c)
43 - 49 , 49 - 55 , 55 - 61...
d)
25 - 31 , 31 - 37 , 37 - 43,...
e)
24.5 - 31.5 , 31.5 - 38.5 , 38.5 - 45.5...
  • {a,b}
  • {e,c,a}
  • {c,a}
  • {d,b}
  • {d,b,a}
Question 6
6.
Read the column-graph given below. Find the year that has minimum food grains production.
  • 2011
  • 2009
  • 2010
  • 2008
  • 2007
Question 7
7.
The air distance of some cities from Delhi (in km) are given below. Find the city that has minimum distance.
  • Trichy
  • Coimbatore
  • Tirupati
  • Vijayawada
  • Kanpur
Question 8
8.
    • Convert the exclusive form of the class interval 42.5 - 48.5 to inclusive form
  • 42.5
    -
    48
  • 43.5
    -
    47.5
  • 43
    -
    48.5
  • 42.5
    -
    48.5
  • 43
    -
    48
Question 9
9.
    • Ages of 13 students (in years) are given below. Find the mean age.
      • 15
      • 14
      • 15
      • 14
      • 14
      • 14
      • 12
      • 13
      • 15
      • 13
      • 10
      • 10
      • 14
  • 199
    13
    years
  • 186
    13
    years
  • 175
    13
    years
  • 174
    13
    years
  • 173
    13
    years
Question 10
10.
The following bar graph shows the export earnings of a country (in thousand crore) during five years. Find the year that has 179 thousand crore export earnings.
  • 2006-07
  • 2007-08
  • 2010-11
  • 2009-10
  • 2008-09