SSC Board Practice

Class VI Class VII Class VIII Class IX Class X
SSC Grade IX - Statistics
Question 1
1.
    • The class mark of the class with frequency x is
    • Class-Interval
      Frequency
      12 - 22
      11
      23 - 33
      x
      34 - 44
      24
      45 - 55
      10
      56 - 66
      27
  • 28
  • 26
  • 31
  • 29
  • 27
Question 2
2.
    • If the upper and lower limit of class interval are 47 and 40 respectively, then the class interval is
  • 39.5
    -
    47
  • 40
    -
    47.5
  • 40.5
    -
    46.5
  • 39.5
    -
    47.5
  • 40
    -
    47
Question 3
3.
    • Temperatures of 124 days (in °C) are given below.
    • Identify the class interval table for the given histogram.
  • Temperature (in degree)
    30 - 35
    35 - 40
    40 - 45
    45 - 50
    50 - 55
    No. of days
    17
    18
    24
    36
    29
  • Temperature (in degree)
    30 - 35
    35 - 40
    40 - 45
    45 - 50
    50 - 55
    No. of days
    17
    18
    29
    36
    29
  • Temperature (in degree)
    30 - 35
    35 - 40
    40 - 45
    45 - 50
    50 - 55
    No. of days
    17
    22
    24
    36
    29
  • Temperature (in degree)
    30 - 35
    35 - 40
    40 - 45
    45 - 50
    50 - 55
    No. of days
    17
    24
    18
    36
    29
  • Temperature (in degree)
    30 - 35
    35 - 40
    40 - 45
    45 - 50
    50 - 55
    No. of days
    17
    29
    24
    36
    18
Question 4
4.
    • Following are the ages (in years) of patients getting medical treatment in a hospital. Identify the cumulative frequency of the given grouped data.
    • Age (in years)
      10 - 15
      15 - 20
      20 - 25
      25 - 30
      30 - 35
      35 - 40
      40 - 45
      No. of Patients
      42
      23
      81
      34
      42
      76
      56
  • Age (in years)
    Cumulative Frequency
    10 - 15
    42
    15 - 20
    65
    20 - 25
    142
    25 - 30
    176
    30 - 35
    218
    35 - 40
    294
    40 - 45
    350
  • Age (in years)
    Cumulative Frequency
    10 - 15
    42
    15 - 20
    98
    20 - 25
    179
    25 - 30
    213
    30 - 35
    255
    35 - 40
    331
    40 - 45
    354
  • Age (in years)
    Cumulative Frequency
    10 - 15
    42
    15 - 20
    123
    20 - 25
    146
    25 - 30
    180
    30 - 35
    222
    35 - 40
    298
    40 - 45
    354
  • Age (in years)
    Cumulative Frequency
    10 - 15
    42
    15 - 20
    65
    20 - 25
    146
    25 - 30
    177
    30 - 35
    219
    35 - 40
    295
    40 - 45
    351
  • Age (in years)
    Cumulative Frequency
    10 - 15
    42
    15 - 20
    65
    20 - 25
    146
    25 - 30
    180
    30 - 35
    222
    35 - 40
    298
    40 - 45
    354
Question 5
5.
    • The marks obtained by
    • 19
    • students in an examination are given below.
    • Represent the data in the form of a frequency distribution table
    • in exclusive form
    • taking class size
    • 8
    • .
      • 50
      • 40
      • 73
      • 64
      • 40
      • 79
      • 74
      • 72
      • 57
      • 73
      • 73
      • 41
      • 51
      • 71
      • 65
      • 67
      • 77
      • 54
      • 76
  • Marks
    40 - 48
    48 - 56
    56 - 64
    64 - 72
    72 - 80
    No. of Students
    3
    1
    3
    4
    8
  • Marks
    40 - 48
    48 - 56
    56 - 64
    64 - 72
    72 - 80
    No. of Students
    3
    8
    1
    4
    3
  • Marks
    40 - 48
    48 - 56
    56 - 64
    64 - 72
    72 - 80
    No. of Students
    3
    3
    1
    4
    8
  • Marks
    40 - 48
    48 - 56
    56 - 64
    64 - 72
    72 - 80
    No. of Students
    3
    5
    1
    4
    8
  • Marks
    40 - 48
    48 - 56
    56 - 64
    64 - 72
    72 - 80
    No. of Students
    3
    3
    6
    4
    8
Question 6
6.
    • The upper limit of the class with frequency x is
    • Class-Interval
      Frequency
      40 - 48
      3
      48 - 56
      1
      56 - 64
      2
      64 - 72
      x
      72 - 80
      8
  • 75
  • 69
  • 72
  • 73
  • 71
Question 7
7.
Which of the following are discrete variables?
a)
Heights of children in a class
b)
Temperature at a place over a month
c)
Wages of workers in a factory
d)
Number of players in a team
e)
Number of members in a family
  • {b,e}
  • {d,e}
  • {c,a,d}
  • {a,d}
  • {b,e,d}
Question 8
8.
    • Heights of 15 plants (in cm) are given below. Find the mean height.
      • 92
      • 98
      • 65
      • 97
      • 90
      • 53
      • 76
      • 74
      • 52
      • 74
      • 90
      • 87
      • 53
      • 56
      • 70
  • 1157
    15
    cm
  • 1127
    15
    cm
  • 376
    5
    cm
  • 1142
    15
    cm
  • 1129
    15
    cm
Question 9
9.
    • Ages of 12 students (in years) are given below. Find the mean age.
      • 10
      • 12
      • 13
      • 15
      • 10
      • 12
      • 11
      • 11
      • 14
      • 11
      • 13
      • 12
  • 10
    years
  • 11
    years
  • 13
    years
  • 12
    years
  • 14
    years
Question 10
10.
    • Given the sample data, prepare the class interval table in
    • inclusive
    • form with
    • 6
    • as min value and a class size of
    • 9
    • .
      • 26
      • 23
      • 44
      • 13
      • 10
      • 14
      • 14
      • 39
      • 15
      • 6
      • 41
      • 50
      • 14
      • 45
      • 19
      • 43
      • 28
  • Class-Interval
    6 - 15
    15 - 24
    24 - 33
    33 - 42
    42 - 51
    Frequency
    6
    3
    2
    2
    4
  • Class-Interval
    6 - 14
    15 - 23
    24 - 32
    33 - 41
    42 - 50
    Frequency
    6
    2
    3
    2
    4
  • Class-Interval
    6 - 14
    15 - 23
    24 - 32
    33 - 41
    42 - 50
    Frequency
    6
    7
    2
    2
    4
  • Class-Interval
    6 - 14
    15 - 23
    24 - 32
    33 - 41
    42 - 50
    Frequency
    6
    4
    2
    2
    3
  • Class-Interval
    6 - 14
    15 - 23
    24 - 32
    33 - 41
    42 - 50
    Frequency
    6
    3
    2
    2
    4