CBSE Questions for Class 9 Maths Statistics Quiz 1 - MCQExams.com

If x is the average(arithmetic mean) of $$5$$ consecutive odd integers, what is the median of integers?
  • $$0$$
  • $$1$$
  • $$x-2$$
  • x
If x and y are both prime numbers such that x < y < 50 , then the maximum possible range of the data 4,6,8, x,y,16 is 
  • 44
  • 45
  • 48
  • 47
Upper limit of class interval $$75 - 85$$ is:
  • $$10$$
  • $$-10$$
  • $$75$$
  • $$85$$
Which two class has same frequency ?
  • $$0-10$$ & $$10-20$$
  • $$10-20$$ & $$40-50$$
  • both
  • none of this
Which class has lowest frequency ?
  • $$0-10$$
  • $$10-20$$
  • $$20-30$$
  • $$30-40$$
The difference between upper and lower limit is called 
  • group
  • class marks
  • class size
  • class internal
The class mark of $$ 95-100$$ is
  • $$100$$
  • $$97.5$$
  • $$95$$
  • $$95.5$$
In the class interval $$30-40$$, $$30$$ is
  • Frequency
  • Range
  • Upper limit
  • Lower limit
Data available in unorganized form is called
  • out comes
  • raw data
  • class
  • frequency
Size of the class $$180 - 195$$ is
  • $$180$$
  • $$195$$
  • $$15$$
  • $$-15$$
In the class interval $$35-46$$, the lower limit is _____
  • $$35$$
  • $$38$$
  • $$40$$
  • $$43$$
The mid-value of $$20-30$$ is _____
  • $$23$$
  • $$22$$
  • $$25$$
  • $$26$$
The mean of $$x, y, z$$ is $$y$$, then $$x+z =$$
  • $$y$$
  • $$2y$$
  • $$3y$$
  • $$zy$$
Consider the data  :  $$2, 3, 2, 4, 5, 6, 4, 2, 3, 3, 7, 8, 2, 2.$$ The frequency of 
$$2$$ is ..............
  • $$3$$
  • $$4$$
  • $$5$$
  • $$6$$
The mid-point of a class intervals is called:
  • class interval
  • class mark
  • class limit
  • upper limit
The formula $$\dfrac{Upper\  class\  limit +  Lower\  class\  limit }{2}$$ is known as
  • Class mark
  • Class interval
  • Upper limit
  • Lower limit
A class interval of a data has $$15$$ as the lower limit and $$25$$ as the size then the class mark is :
  • $$26.5$$
  • $$27$$
  • $$27.5$$
  • None of these
$$0-10, 10-20, 20-30 ...$$  so on are the classes, the lower boundary of the class $$20-30$$ is _____
  • $$20$$
  • $$21$$
  • $$18$$
  • $$22$$
Which one of the following groups has different class size from others?
  • $$120 - 125$$
  • $$243 - 249$$
  • $$141.5 - 146.5$$
  • $$315.5 - 320.5$$
Lower class limit of $$15 -18$$ is _____
  • $$15$$
  • $$18$$
  • $$15$$ or $$18$$
  • None of these
The number of times a particular item occurs in a class interval is called its:
  • mean
  • frequency
  • cumulative frequency
  • none of these
In the class interval $$35 - 46$$, the lower limit is _____
  • $$35$$
  • $$46$$
  • Can't determine
  • None of these
In an examination, $$10$$ students scored the following marks in Mathematics: $$35, 19, 28, 32, 63, 02, 47, 31, 13, 98$$. Its range is
  • $$2$$
  • $$96$$
  • $$98$$
  • $$50$$
The mean of $$x + 3, x + 5, x + 7, x + 9$$ and $$x + 11$$ is
  • $$2x+7$$
  • $$x+8$$
  • $$x+7$$
  • None of these
What is the difference of frequencies of the intervals  30-40 and 40-50 ?

97960_1c87fb78f3db4748b02aa5e680d766e3.png
  • $$5$$
  • $$20$$
  • $$15$$
  • $$25$$
The range of the data $$7, 13, 6, 25, 18, 20 , 16 $$ is _____
  • $$13$$
  • $$19$$
  • $$20$$
  • $$25$$
Construct a frequency distribution table for the data, taking class-intervals 4-6, 6-8, ............., 14-16.
11.5
 4.5
 7.4
 9.8
 4.6
14.2
  6.6
15.5
6.3
  6
5.3
8.25
 6.4
15.3
  4.3
14.4
7.8
8.3
8.4
6.5
8.9
11.7
 4.7
12.2
9.2
12.5
15.2
5.8
10.8
9.9
9.4
7.7
10.5
15.8
  8.9
10.5
12.7
 8.8
10.1
  5.5

  • C.I.       
    Tally Marks.       Frequency
     4-6
     6-8
     8-10
    10-12
    12-14
    14-16
    $${||||}\! \! \! \! \! \! {\diagdown}\:   ||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   |||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   {||||}\! \! \! \! \! \! {\diagdown}$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
    |||
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
     7
     8
    10
     6  
     3
     6
  • C.I.       
    Tally Marks.       Frequency
     4-6
     6-8
     8-10
    10-12
    12-14
    14-16
    $${||||}\! \! \! \! \! \! {\diagdown}\:   ||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   |||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   {||||}\! \! \! \! \! \! {\diagdown}$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
    |||
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
     7
     10
     8
     6  
     3
     6
  • C.I.       
    Tally Marks.       Frequency
     4-6
     6-8
     8-10
    10-12
    12-14
    14-16
    $${||||}\! \! \! \! \! \! {\diagdown}\:   ||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   |||$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:   {||||}\! \! \! \! \! \! {\diagdown}$$
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
    |||
    $${||||}\! \! \! \! \! \! {\diagdown}\:  |$$
     6
     8
    10
     8  
     3
     3
  • None of these
The difference between the greatest and the least value of the observations is known as 
  • M.D.
  • S.D.
  • Range
  • Variance
How many articles have cost Rs. $$50$$ ?
Cost (in Rs.) :$$10 - 20$$$$20-30$$$$30-40$$$$40-50$$$$50-60$$$$60-70$$
Frequency :$$22$$ $$18$$$$35$$ $$115$$ $$38$$$$22$$
  • $$22$$
  • $$38$$
  • $$35$$
  • $$115$$
Class mark of a class is obtained by using
  • Upper limit
  • $$\dfrac {1}{2}$$ [Upper limit - Lower limit]
  • $$\dfrac {1}{2}$$ [Upper limit + lower limit]
  • $$\dfrac {1}{2}$$ [Upper limit + Lower limit] $$-1$$
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