Ex 5.1, 1 For which of these would you use a histogram to show the data? Give reasons for each. (a) The number of letters for different areas in a postman’s bag.For Histogram
On the y-axis, we have numbers
& on the x-axis, we have data which is continuous & will always be number.
Here,
In y-axis, we have number of letters
In x-axis, we have different areas
Since different areas is not continuous,
we cannot make a histogram.
We use bar graph instead
Example data can be the table
Bar graph should be used to show this data.
Ex 5.1, 1 (b) The height of competitors in an athletics meet.For Histogram
On the y-axis, we have numbers
& on the x-axis, we have data which is continuous & will always be number.
Here,
In y-axis, we have number of competitors
In x-axis, we have height, which is continuous
Since height is continuous,
we make a histogram
Example:
Ex 5.1, 1 (c) The number of cassettes produced by 5 companies.For Histogram
On the y-axis, we have numbers
& on the x-axis, we have data which is continuous & will always be number.
Ex 5.1, 1 For which of these would you use a histogram to show the data? Give reasons for each. (d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station.Histogram can be used to show the no. of passengers boarding trains from 7:00 a.m to 7:00 p.m at a station as the timings can be easily divided into class intervals.
Example : Assume the following distribution :
Ex 5.1, 1 (d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station.For Histogram
On the y-axis, we have numbers
& on the x-axis, we have data which is continuous & will always be number.
Here,
In y-axis, we have number of passengers
In x-axis, we have time
Since time is continuous, first 7 am to 8 am, then 8 to 9 and so on
we make a histogram
Example:

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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