Given below are the heights (in cm) of ninety children.Prepare a frequency table by grouping their heights into classes of 90 - 95 cm, 95 - 100 cm, 100 - 105 cm, 105 - 110 cm , 110 - 115 cm, 115 - 120 cm. 107 96 108 103 112 106 115 111 115 101 109 113 112 100 109 113 118 104 94 114 99 114 106 114 98 109 107 114 106 107 93 104 103 113 107 94 102 117 116 104 112 101 92 105 104 115 111 103 110 99 108 105 116 109 114 110 97 110 113 116 105 110 109 101 106 108 107 107 101 109 118 102 114 108 94 104 113 102 105 95 99 107 102 98 115 95 106 110 108 105 Also represent the data by histogram.

A frequency table is a table that lists items and shows the number of times the items occur. The frequency table of above data is presented below: Heights (in cm) Frequency 90 - 95 5 95 - 100 9 100 - 105 17 105 - 110 28 110 - 115 21 115 - 120 10 Now we know that a histogram is a display of statistical information that uses rectangles to show the frequency of data items in successive numerical intervals of equal size. The required histogram is as follows:-

The number of students in a hostel speaking different languages is given below: Language English Hindi Punjabi Bengali Urdu Number of students 24 80 18 7 8 Display the above data in a pie chart.

Given, The number of students in a hostel speaking different languages is given below: Language English Hindi Punjabi Bengali Urdu Number of students 24 80 18 7 8 Angle of sector = Value of item Sum of values of items × 360 ° . Now finding the angle of sector for different subjects English= 24 137 × 360 ° = 63.06 ° = 63 ° (approx.) Hindi = 80 137 × 360 ° = 210.21 ° = 210 ° (approx.) Punjabi = 18 137 × 360 ° = 47.29 ° = 47 ° (approx.) Bengali = 7 137 × 360 ° = 18.39 ° = 18 ° (approx.) Urdu = 360 ° - ( 63 ° + 210 ° + 47 ° + 18 ° ) = 22 ° Now representing the above values on a pie chart.

On Sunday, the sales (in ₹ ) of different bakery items in a store are as follows: Item Sales (in ₹ ) Bread 320 Fruit bread 120 Cakes and Pastries 160 Biscuits 80 Others 40 Draw a pie chart for the data.

On Sunday, the sales (in ₹ ) of different bakery items in a store are as follows: Item Sales (in ₹ ) Bread 320 Fruit bread 120 Cakes and Pastries 160 Biscuits 80 Others 40 We know that angle of sector = Value of items Sum of values of all itmes × 360 ° Angle of sector for Bread = 320 720 × 360 ° = 160 ° Angle of sector for Fruit bread = 120 720 × 360 ° = 60 ° Angle of sector for Cake and pastries = 160 720 × 360 ° = 80 ° Angle of sector for Biscuits = 80 720 × 360 ° = 40 ° Angle of sector for Others = 40 720 × 360 ° = 20 ° Now representing these data on pie chart

The following table shows the expenditure of a family on different heads per month. Item Expenditure (in ₹ ) House rent 900 Food 2250 Clothing 450 Education 600 Healthcare 900 Savings 1500 Miscellaneous 600 Draw a pie chart to represent the monthly expenditure of the family.

Given: Item Expenditure (in ₹ ) House rent 900 Food 2250 Clothing 450 Education 600 Healthcare 900 Savings 1500 Miscellaneous 600 Angle of sector = Value of item Sum of value of items × 360 ° Angle of sector for House rent = 900 7200 × 360 ° = 45 ° Angle of sector for Food = 2250 7200 × 360 ° = 112.5 ° Angle of sector for Clothing = 450 7200 × 360 ° = 22.5 ° Angle of sector for Education = 600 7200 × 360 ° = 30 ° Angle of sector for Healthcare = 900 7200 × 360 ° = 45 ° Angle of sector for Savings = 1500 7200 × 360 ° = 75 ° Angle of sector for Miscellaneous = 600 7200 × 360 ° = 30 ° Now representing the above data on the pie chart

EASY

8th CBSE

IMPORTANT

Earn 100

The histogram given alongside is based on the number of hours $30$ students spent outdoors on a Sunday.

What is the size of each class interval?

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Important Questions on Data Handling

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 5

The histogram given alongside is based on the number of hours $30$ students spent outdoors on a Sunday.

How many students spent less than an hour outdoors?

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EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 5

The histogram given alongside is based on the number of hours

30

students spent outdoors on a Sunday.

Which interval of time were the largest number of students present outdoors?

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EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 5

The histogram given alongside is based on the number of hours $30$ students spent outdoors on a Sunday. How many students spent more than four hours outdoors?

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EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 5

The histogram given alongside is based on the number of hours $30$ students spent outdoors on a Sunday.

How many students spent more than three hours outdoors?

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MEDIUM

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 6

Given below are the heights (in cm) of ninety children.Prepare a frequency table by grouping their heights into classes of $90 - 95$ cm, $95 - 100$ cm, $100 - 105$ cm, $105 - 110$ cm $, 110 - 115$ cm, $115 - 120$ cm.

$107$	$96$	$108$	$103$	$112$	$106$	$115$	$111$	$115$	$101$	$109$	$113$	$112$	$100$	$109$
$113$	$118$	$104$	$94$	$114$	$99$	$114$	$106$	$114$	$98$	$109$	$107$	$114$	$106$	$107$
$93$	$104$	$103$	$113$	$107$	$94$	$102$	$117$	$116$	$104$	$112$	$101$	$92$	$105$	$104$
$115$	$111$	$103$	$110$	$99$	$108$	$105$	$116$	$109$	$114$	$110$	$97$	$110$	$113$	$116$
$105$	$110$	$109$	$101$	$106$	$108$	$107$	$107$	$101$	$109$	$118$	$102$	$114$	$108$	$94$
$104$	$113$	$102$	$105$	$95$	$99$	$107$	$102$	$98$	$115$	$95$	$106$	$110$	$108$	$105$

Also represent the data by histogram.

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 7

The number of students in a hostel speaking different languages is given below:

Language	English	Hindi	Punjabi	Bengali	Urdu
Number of students	$24$	$80$	$18$	$7$	$8$

Display the above data in a pie chart.

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 8

On Sunday, the sales (in $₹$ ) of different bakery items in a store are as follows:

Item	Sales (in $₹$ )
Bread	$320$
Fruit bread	$120$
Cakes and Pastries	$160$
Biscuits	$80$
Others	$40$

Draw a pie chart for the data.

MEDIUM

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 22 - Data Handling>Exercise>Q 9

The following table shows the expenditure of a family on different heads per month.

Item	Expenditure (in $₹$ )
House rent	$900$
Food	$2250$
Clothing	$450$
Education	$600$
Healthcare	$900$
Savings	$1500$
Miscellaneous	$600$

Draw a pie chart to represent the monthly expenditure of the family.

The histogram given alongside is based on the number of hours 30 students spent outdoors on a Sunday. What is the size of each class interval?

Important Questions on Data Handling

Learn and Prepare for any exam you want !

The histogram given alongside is based on the number of hours $30$ students spent outdoors on a Sunday.

What is the size of each class interval?