Q105 of 116 Page 42

The following histogram shows the frequency distribution of teaching experiences of 30 teachers in various schools:


(a) What is the class width?


(b) How many teachers are having the maximum teaching experience and how many have the least teaching experience?


(c) How many teachers have teaching experience of 10 to 20 years?

(a) Answer: From the above histogram, we can say that the 5.


(b) From the diagram, 16 teachers have the maximum teaching experience i.e. of 15 years.


And, 2 teachers have the least experience (< 5 years)


(c) Form the chart,


16 teachers have the experience between 10 years to 20 years.


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103

In a hypothetical sample of 20 people, the amount of money (in thousands of rupees) with each was found to be as follows:

114, 108, 100, 98, 101, 109, 117, 119, 126, 131, 136, 143, 156, 169, 182, 195, 207, 219, 235, 118.


Draw a histogram of the frequency distribution, taking one of the class intervals as 50 –100.

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The below histogram shows the number of literate females in the age group of 10 to 40 years in a town.

(a) Write the classes assuming all the classes are of equal width.


(b) What is the classes width?


(c) In which age group are literate females the least?


(d) In which age group is the number of literate females the highest?


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Draw a pie chart for this data.

 107

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Draw a pie chart for this data.