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
Class mark of a particular class is 9.5 and the class size is 6, then the class interval is
  • A
    6.5-12.5
    Correct
  • B
    3.5-15.5
  • C
    12.5-18.5
  • D
    15.5-27.5
2
The class size of a distribution is 25 and the first class interval is 200-224. Then, the class marks of first two class intervals are
  • A
    212, 237
    Correct
  • B
    237, 287
  • C
    212, 262
  • D
    237, 262
3
Observe the table given below and choose the correct alternative : The class mark or R is
Question 3 figure 1
  • A
    55
    Correct
  • B
    50
  • C
    60
  • D
    60
4
In a frequency distribution, the mid-value of a class is 60.5 and the width of the class is 10. The lower limit of the class is
  • A
    55.5
    Correct
  • B
    65.5
  • C
    62.5
  • D
    56.5
5
The width of each of five continuous classes in a frequency distribution is 5 and the lower class limit of the lowest class is 10. The upper class limit of the highest class is
  • A
    15
  • B
    40
  • C
    25
  • D
    35
    Correct
6
Let m be the mid-point and \({\bf{l}}\) be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is
  • A
    2m + \({\bf{l}}\)
  • B
    2m - \({\bf{l}}\)
    Correct
  • C
    m - 2\({\bf{l}}\)
  • D
    m - \({\bf{l}}\)
7
A grouped frequency table with class intervals of equal size using 3-5 (5 included in this interval) as one of the class intervals is constructed for the following data. The frequency of the class 3-5 is
Question 7 figure 1
  • A
    11
    Correct
  • B
    8
  • C
    5
  • D
    3
8
The given cumulative frequency distribution shows the class intervals and their corresponding cumulative frequencies. Then the frequency of class interval 20-30 is
Question 8 figure 1
  • A
    9
    Correct
  • B
    5
  • C
    20
  • D
    11
9
‘Less than’ cumulative frequency table for a given data is as follows. Then, the frequency of class interval 20-30 is
Question 9 figure 1
  • A
    34
  • B
    14
  • C
    55
  • D
    20
    Correct
10
‘More than’ cumulative frequency table for a given data is as follows: Then, the frequency of the class interval 70-80 is
Question 10 figure 1
  • A
    10
  • B
    35
  • C
    22
  • D
    12
    Correct
11
In a bar graph, 0.25 cm length of a bar represents 100 people. Then, the length of bar which represents 2000 people is
  • A
    4 cm
  • B
    5 cm
    Correct
  • C
    4.5 cm
  • D
    3.5 cm
12
In a bar graph if 1 cm represents 30 km, then the length of bar needed to represent 75 km is
  • A
    3.5 cm
  • B
    2 cm
  • C
    2.5 cm
    Correct
  • D
    3 cm
13
In a bar graph, the widths of bars
  • A
    are proportional to the space between two consecutive bars
  • B
    have no significance
    Correct
  • C
    are proportional to the corresponding heights
  • D
    are proportional to the corresponding frequencies
14
In a histogram, which of the following is proportional to the frequency of the corresponding class?
  • A
    Width of the rectangle
  • B
    Length of the rectangle
  • C
    Area of the rectangle
    Correct
  • D
    Perimeter of the rectangle
15
For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequency of respective classes and abscissa are respectively
  • A
    upper limits of preceeding classes
  • B
    upper limits of the classes
  • C
    class marks of the classes
    Correct
  • D
    lower limits of the classes