CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade X - Statistics
Question 1
1.
    • Ages of 70 students (in years) are given below.
    • Identify the frequency distribution table for the given '
    • less than
    • ' ogive.
  • Age (in years)
    14 - 22
    22 - 30
    30 - 38
    38 - 46
    46 - 54
    54 - 62
    No. of students
    19
    8
    9
    6
    14
    14
  • Age (in years)
    14 - 22
    22 - 30
    30 - 38
    38 - 46
    46 - 54
    54 - 62
    No. of students
    19
    8
    9
    11
    14
    14
  • Age (in years)
    14 - 22
    22 - 30
    30 - 38
    38 - 46
    46 - 54
    54 - 62
    No. of students
    19
    14
    9
    6
    14
    8
  • Age (in years)
    14 - 22
    22 - 30
    30 - 38
    38 - 46
    46 - 54
    54 - 62
    No. of students
    19
    8
    6
    6
    14
    14
  • Age (in years)
    14 - 22
    22 - 30
    30 - 38
    38 - 46
    46 - 54
    54 - 62
    No. of students
    19
    9
    8
    6
    14
    14
Question 2
2.
    • Daily wages of 91 labourers (in ₹) are given below.
    • Identify the frequency distribution table for the given '
    • more than
    • ' ogive.
  • Daily wage (in Rs)
    274 - 283
    283 - 292
    292 - 301
    301 - 310
    310 - 319
    319 - 328
    328 - 337
    No. of labourers
    11
    14
    8
    17
    10
    18
    13
  • Daily wage (in Rs)
    274 - 283
    283 - 292
    292 - 301
    301 - 310
    310 - 319
    319 - 328
    328 - 337
    No. of labourers
    11
    13
    8
    17
    10
    18
    14
  • Daily wage (in Rs)
    274 - 283
    283 - 292
    292 - 301
    301 - 310
    310 - 319
    319 - 328
    328 - 337
    No. of labourers
    11
    8
    14
    17
    10
    18
    13
  • Daily wage (in Rs)
    274 - 283
    283 - 292
    292 - 301
    301 - 310
    310 - 319
    319 - 328
    328 - 337
    No. of labourers
    11
    14
    3
    17
    10
    18
    13
  • Daily wage (in Rs)
    274 - 283
    283 - 292
    292 - 301
    301 - 310
    310 - 319
    319 - 328
    328 - 337
    No. of labourers
    11
    14
    8
    14
    10
    18
    13
Question 3
3.
    • Scores of 65 students are given below.
    • Identify the frequency distribution table for the given '
    • median
    • ' ogive.
  • Score
    77 - 84
    84 - 91
    91 - 98
    98 - 105
    105 - 112
    No. of students
    20
    12
    12
    10
    11
  • Score
    77 - 84
    84 - 91
    91 - 98
    98 - 105
    105 - 112
    No. of students
    20
    11
    12
    10
    12
  • Score
    77 - 84
    84 - 91
    91 - 98
    98 - 105
    105 - 112
    No. of students
    20
    12
    11
    10
    12
  • Score
    77 - 84
    84 - 91
    91 - 98
    98 - 105
    105 - 112
    No. of students
    20
    6
    12
    10
    12
  • Score
    77 - 84
    84 - 91
    91 - 98
    98 - 105
    105 - 112
    No. of students
    20
    11
    14
    10
    12
Question 4
4.
    • The Marks obtained by 50 students of a class in an examination is given below.
    • Identify the frequency distribution table for the given '
    • more than
    • ' ogive.
  • Marks
    10 - 20
    20 - 30
    30 - 40
    40 - 50
    50 - 60
    60 - 70
    No. of students
    10
    9
    7
    8
    9
    7
  • Marks
    10 - 20
    20 - 30
    30 - 40
    40 - 50
    50 - 60
    60 - 70
    No. of students
    10
    9
    7
    6
    9
    7
  • Marks
    10 - 20
    20 - 30
    30 - 40
    40 - 50
    50 - 60
    60 - 70
    No. of students
    10
    9
    4
    8
    9
    7
  • Marks
    10 - 20
    20 - 30
    30 - 40
    40 - 50
    50 - 60
    60 - 70
    No. of students
    10
    7
    9
    8
    9
    7
  • Marks
    10 - 20
    20 - 30
    30 - 40
    40 - 50
    50 - 60
    60 - 70
    No. of students
    10
    7
    7
    8
    9
    9
Question 5
5.
    • The heights of 47 pupils in a school are given below.
    • Identify the frequency distribution table for the given '
    • less than
    • ' ogive.
  • Height (in cm)
    125 - 135
    136 - 146
    147 - 157
    158 - 168
    169 - 179
    180 - 190
    No. of pupils
    10
    10
    9
    8
    10
    5
  • Height (in cm)
    125 - 135
    136 - 146
    147 - 157
    158 - 168
    169 - 179
    180 - 190
    No. of pupils
    10
    10
    4
    8
    10
    5
  • Height (in cm)
    125 - 135
    136 - 146
    147 - 157
    158 - 168
    169 - 179
    180 - 190
    No. of pupils
    10
    5
    4
    8
    10
    10
  • Height (in cm)
    125 - 135
    136 - 146
    147 - 157
    158 - 168
    169 - 179
    180 - 190
    No. of pupils
    10
    4
    10
    8
    10
    5
  • Height (in cm)
    125 - 135
    136 - 146
    147 - 157
    158 - 168
    169 - 179
    180 - 190
    No. of pupils
    10
    10
    4
    3
    10
    5
Question 6
6.
Which of the following are continuous variables?
a)
Number of members in a family
b)
Population of cities
c)
Heights of children in a class
d)
Temperature at a place over a month
e)
Marks obtained by student in a particular subject
  • {a,c}
  • {b,d,c}
  • {b,d}
  • {e,a,c}
  • {c,d}
Question 7
7.
    • The daily wages of
    • 131
    • workers in a factory are given below.
    • Find the
    • mode wage.
    • Wage (in rupees)
      20 - 30
      31 - 41
      42 - 52
      53 - 63
      64 - 74
      75 - 85
      86 - 96
      97 - 107
      No. of workers
      9
      29
      16
      5
      22
      23
      17
      10
  • ₹
    37.33
  • ₹
    38.17
  • ₹
    39.17
  • ₹
    37.17
  • ₹
    37.50
Question 8
8.
    • Convert the continuous form of the class interval 19.5 - 27.5 to discontinuous form
  • 19.5
    -
    27.5
  • 19.5
    -
    27
  • 20.5
    -
    26.5
  • 20
    -
    27.5
  • 20
    -
    27
Question 9
9.
    • Identify the frequency distribution table for the given '
    • more than
    • ' ogive.
  • Class-Interval
    16 - 22
    23 - 29
    30 - 36
    37 - 43
    44 - 50
    Frequency
    16
    6
    15
    8
    13
  • Class-Interval
    16 - 22
    23 - 29
    30 - 36
    37 - 43
    44 - 50
    Frequency
    2
    20
    20
    4
    20
  • Class-Interval
    16 - 22
    23 - 29
    30 - 36
    37 - 43
    44 - 50
    Frequency
    3
    7
    8
    4
    5
  • Class-Interval
    16 - 22
    23 - 29
    30 - 36
    37 - 43
    44 - 50
    Frequency
    11
    5
    15
    5
    4
  • Class-Interval
    16 - 22
    23 - 29
    30 - 36
    37 - 43
    44 - 50
    Frequency
    15
    16
    14
    1
    12
Question 10
10.
    • A frequency distribution table is given below.
    • Find the
    • mean .
    • Class-Interval
      13 - 19
      19 - 25
      25 - 31
      31 - 37
      37 - 43
      43 - 49
      49 - 55
      55 - 61
      Frequency
      21
      39
      1
      24
      23
      48
      17
      45
  • 4330
    109
  • 4439
    109
  • 4331
    109
  • 4548
    109
  • 4332
    109