(A) The class marks are given as $15, 20, 25, \ldots$The class size $(h)$ is the difference between two consecutive class marks: $h = 20 - 15 = 5$.For

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(A) The class marks are given as $15, 20, 25, \ldots$The class size $(h)$ is the difference between two consecutive class marks: $h = 20 - 15 = 5$.For a class mark $x$,the class interval is given by $(x - h/2)$ to $(x + h/2)$.For the class mark $x = 20$ and class size $h = 5$:Lower limit = $20 - 5/2 = 20 - 2.5 = 17.5$.Upper limit = $20 + 5/2 = 20 + 2.5 = 22.5$.Therefore,the class interval is $17.5-22.5$.

Class 9 Mathematics Statistics Mix Examples - Statistics and Probability

Easy

The class marks of a frequency distribution are given as follows: $15, 20, 25, \ldots$ The class interval corresponding to the class mark $20$ is:

A
$17.5-22.5$
B
$12.5-17.5$
C
$18.5-21.5$
D
$19.5-20.5$

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Class 9 Questions

Class 9

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Statistics

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Mix Examples - Statistics and Probability

Draw a histogram of the following distribution:

Heights (in $cm$) Number of students

$150-153$ $7$

$153-156$ $8$

$156-159$ $14$

$159-162$ $10$

$162-165$ $6$

$165-168$ $5$

Heights (in $cm$)	Number of students
$150-153$	$7$
$153-156$	$8$
$156-159$	$14$
$159-162$	$10$
$162-165$	$6$
$165-168$	$5$

Medium

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Represent the following data by a bar graph:

Name of student Kavya Ariv Ahaan Arya Arushi

Marks scored $90$ $80$ $50$ $60$ $40$

Medium

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Find the mean,the median,and the mode of the observations:
$33, 92, 55, 90, 35, 77, 58, 41, 80, 64, 46$

Medium

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The class mark of a frequency distribution with equal sizes of two successive classes is $72$ and $77$. Then,the width of the class is ...........

Easy

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Expenditure on education of a country during a five-year period $(2002-2006)$,in crores of rupees,is given below:
Elementary education $240$
Secondary education $120$
University education $190$
Teacher's training $20$
Social education $10$
Other educational programmes $115$
Cultural programmes $25$
Technical education $125$

Represent the information above by a bar graph.

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Name of student	Kavya	Ariv	Ahaan	Arya	Arushi
Marks scored	$90$	$80$	$50$	$60$	$40$

Elementary education	$240$
Secondary education	$120$
University education	$190$
Teacher's training	$20$
Social education	$10$
Other educational programmes	$115$
Cultural programmes	$25$
Technical education	$125$

The class marks of a frequency distribution are given as follows: $15, 20, 25, \ldots$ The class interval corresponding to the class mark $20$ is:

Similar Questions

Draw a histogram of the following distribution: Heights (in $cm$) Number of students $150-153$ $7$ $153-156$ $8$ $156-159$ $14$ $159-162$ $10$ $162-165$ $6$ $165-168$ $5$

Represent the following data by a bar graph: Name of student Kavya Ariv Ahaan Arya Arushi Marks scored $90$ $80$ $50$ $60$ $40$

Find the mean,the median,and the mode of the observations:$33, 92, 55, 90, 35, 77, 58, 41, 80, 64, 46$

The class mark of a frequency distribution with equal sizes of two successive classes is $72$ and $77$. Then,the width of the class is ...........

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Draw a histogram of the following distribution:

Heights (in $cm$) Number of students

$150-153$ $7$

$153-156$ $8$

$156-159$ $14$

$159-162$ $10$

$162-165$ $6$

$165-168$ $5$

Represent the following data by a bar graph:

Name of student Kavya Ariv Ahaan Arya Arushi

Marks scored $90$ $80$ $50$ $60$ $40$

Find the mean,the median,and the mode of the observations:
$33, 92, 55, 90, 35, 77, 58, 41, 80, 64, 46$