Statistics CBSE Questions & Answers

Statistics

This is Mathematics Class 09 Statistics CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A student collects information about the number of school going children in a locality consisting of a hundred households. The data collected by him is
  • A
    Arrayed data
  • B
    Primary data
    Correct
  • C
    Grouped data
  • D
    Secondary data
2
To analyse the election results, the data is collected from a newspapers. The data thus collected is known as
  • A
    grouped data
  • B
    secondary data
    Correct
  • C
    primary data
  • D
    raw data
3
Which of the following variables are discrete ? 1. Size of shoes, 2. Number of pages in a book, 3. Distance travelled by a train, 4. Time
  • A
    2 and 4
  • B
    1 and 2
    Correct
  • C
    1 and 4
  • D
    1 and 3
4
For a given data, the difference between the maximum and minimum observation is known as its
  • A
    class
  • B
    class mark
  • C
    range
    Correct
  • D
    class limit
5
In an examination, ten students scored the following marks: 60, 58, 90, 51, 47, 81, 70, 95, 87, 99. The range of this data is
  • A
    51
  • B
    60
  • C
    81
  • D
    52
    Correct
6
The range of the data 20, 8, 20, 18, 16, 15, 30, 12, 22, 6, 11, 17, 25, 32, 10, 19 is
  • A
    16
  • B
    26
    Correct
  • C
    15
  • D
    18
7
A data is such that its maximum value is 75 and range is 20, then the minimum value is
  • A
    75
  • B
    20
  • C
    55
    Correct
  • D
    95
8
The minimum value o a data is 82 and range is 38, then the maximum value is
  • A
    60
  • B
    120
    Correct
  • C
    82
  • D
    76
9
In a grouped frequency distribution, the class intervals are 0-10, 10-20, 20-30, .., then the class width is
  • A
    20
  • B
    30
  • C
    10
    Correct
  • D
    15
10
In a grouped frequency distribution, the class intervals are 1-20, 21-40, 41-60, . . , then the class width is
  • A
    10
  • B
    20
    Correct
  • C
    10.5
  • D
    30
11
Class size of a distribution having 28, 34, 40, 46 and 52 as its class marks is
  • A
    4
  • B
    3
  • C
    6
    Correct
  • D
    5
12
Given the class intervals 0-10, 10-20, 20-30,…, then 10 is considered in class
  • A
    10-30
  • B
    0-20
  • C
    0-10
  • D
    10-20
    Correct
13
Given the class intervals 1-10, 11-20, 21-30, …, then 20 is considered in class
  • A
    21-30
  • B
    11-30
  • C
    15-25
  • D
    11-20
    Correct
14
The class mark of the class interval 2.4-6.6 is
  • A
    4.2
  • B
    2.4
  • C
    4.5
    Correct
  • D
    6.6
15
The class marks of a frequency distribution are as given below: 38, 43, 48, 53, 58. The class corresponding to the class mark 43 is
  • A
    35.5-45.5
  • B
    38.5-48.5
  • C
    38-48
  • D
    40.5 – 45.5
    Correct