CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade IX - Statistics
Question 1
1.
    • Scores of 15 students are given below. Find the mean.
    • Score
      70
      71
      74
      77
      80
      84
      87
      90
      No. of students
      2
      4
      1
      3
      1
      1
      2
      1
  • 1187
    15
  • 1172
    15
  • 1159
    15
  • 386
    5
  • 1157
    15
Question 2
2.
Students of a certain locality use different modes of travel to school as given below. Find the mode of travel that has minimum students.
  • By Foot
  • Auto
  • School Van
  • RTC Bus
  • Scooter
Question 3
3.
    • Rainfall of 10 days (in mm) are given below. Find the mean rainfall.
      • 8
      • 12
      • 6
      • 7
      • 12
      • 11
      • 12
      • 5
      • 8
      • 8
  • 89
    10
    mm
  • 9
    mm
  • 99
    10
    mm
  • 109
    10
    mm
  • 91
    10
    mm
Question 4
4.
    • The true lower limit and true upper limit of the class with frequency x is
    • Class-Interval
      Frequency
      29 - 37
      12
      38 - 46
      10
      47 - 55
      13
      56 - 64
      x
      65 - 73
      18
  • 56
    -
    64
  • 55.5
    -
    64.5
  • 55
    -
    64.5
  • 55.5
    -
    65
  • 55
    -
    65
Question 5
5.
Which of the following class intervals are in inclusive form?
a)
38 - 43 , 43 - 48 , 48 - 53...
b)
23 - 28 , 29 - 34 , 35 - 40,...
c)
23 - 28 , 28 - 33 , 33 - 38,...
d)
41 - 46 , 47 - 52 , 53 - 58,...
e)
22.5 - 28.5 , 28.5 - 34.5 , 34.5 - 40.5...
  • {a,b}
  • {c,d}
  • {e,a,b}
  • {c,d,b}
  • {b,d}
Question 6
6.
There are certain creatures in a zoo. Find the type of creature that has maximum presense in the zoo.
  • Wild animals
  • Beast animals
  • Reptiles
  • Water animals
  • Domestic animals
Question 7
7.
    • Given the mean of
    • 12
    • samples as
    • 5
      2
      3
    • ,
    • what is the new mean if two samples
    • 9
    • and
    • 2
    • are removed ?
  • 11
    2
  • 59
    10
  • 57
    10
  • 67
    12
  • 47
    8
Question 8
8.
    • Given class interval table, find the sum of frequencies.
    • Class-Interval
      42 - 50
      51 - 59
      60 - 68
      69 - 77
      Frequency
      29
      4
      5
      19
  • 54
  • 57
  • 56
  • 58
  • 60
Question 9
9.
    • Ages of 12 students (in years) are given below. Find the median age.
      • 13
      • 11
      • 13
      • 15
      • 11
      • 10
      • 15
      • 14
      • 12
      • 15
      • 14
      • 11
  • 13
    years
  • 12
    years
  • 11
    years
  • 14
    years
  • 15
    years
Question 10
10.
    • Daily wages of 190 labourers (in ₹) are given below.
    • Identify the class interval table for the given frequency polygon.
  • Daily wage (in Rs)
    251 - 256
    256 - 261
    261 - 266
    266 - 271
    271 - 276
    276 - 281
    281 - 286
    286 - 291
    No. of labourers
    19
    29
    47
    12
    30
    8
    5
    40
  • Daily wage (in Rs)
    251 - 256
    256 - 261
    261 - 266
    266 - 271
    271 - 276
    276 - 281
    281 - 286
    286 - 291
    No. of labourers
    19
    29
    12
    47
    30
    8
    5
    40
  • Daily wage (in Rs)
    251 - 256
    256 - 261
    261 - 266
    266 - 271
    271 - 276
    276 - 281
    281 - 286
    286 - 291
    No. of labourers
    19
    29
    14
    47
    30
    8
    5
    40
  • Daily wage (in Rs)
    251 - 256
    256 - 261
    261 - 266
    266 - 271
    271 - 276
    276 - 281
    281 - 286
    286 - 291
    No. of labourers
    19
    29
    12
    47
    34
    8
    5
    40
  • Daily wage (in Rs)
    251 - 256
    256 - 261
    261 - 266
    266 - 271
    271 - 276
    276 - 281
    281 - 286
    286 - 291
    No. of labourers
    19
    40
    12
    47
    30
    8
    5
    29