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How do we Find the Median? | Don't Memorise

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2.Tally marks

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Maths - Data Handling - How to Use Tally Charts for Counting - English

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Math for kids: Learn Data Handling | iKen | iKen App | iKen Edu

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Data Handling (Quiz) : Mathematics : Class 6 : Amrita Vidyalayam eLearning Network

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Bar graphs or Column graphs

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A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.

Imagine you just did a survey of your friends to find which kind of movie they liked best:

We can show that on a bar graph like this:

It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers a shop has on different days and so on.

Example: Nicest Fruit

A survey of 145 people asked them "Which is the nicest fruit?":

And here is the bar graph:

That group of people think Blueberries are the nicest.

Bar Graphs can also be Horizontal, like this:

Example: Student Grades

In a recent test, this many students got these grades:

And here is the bar graph:

You can create graphs like that using our Data Graphs (Bar, Line, Dot, Pie, Histogram) page.

Histograms vs Bar Graphs

Bar Graphs are good when your data is in categories (such as "Comedy", "Drama", etc).

But when you have continuous data(such as a person's height) then use a Histogram.

It is best to leave gaps between the bars of a Bar Graph, so it doesn't look like a Histogram.

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A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights. Imagine you just did a survey of your friends to find which kind of movie they liked best: We can show that on a bar graph like this: It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

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Pictographs

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A Pictograph is a way of showing data using images.

Each image stands for a certain number of things.

Example: Apples Sold

Here is a pictograph of how many apples were sold at the local shop over 4 months:

Note that each picture of an apple means 10 apples (and the half-apple picture means 5 apples).

So the pictograph is showing:

In January 10 apples were sold

In February 40 apples were sold

In March 25 apples were sold

In April 20 apples were sold

It is a fun and interesting way to show data.

But it is not very accurate: in the example above we can't show just 1 apple sold, or 2 apples sold etc.

Pictographs can also be vertical, like this:

Example: Games Played

Four friends play a lot of tennis. Here is how many games they played this year:

Each tennis ball means 20 games played. A tennis ball can be cut to show part of 20.

So the pictograph is showing:

Can you see that Alex played 55 games?

Why don't you try to make your own pictographs? Here are a few ideas:

How much money you have (week by week)

How much exercise you get (each day)

How many hours you play games every week

How much water you drink

How far your friends travel every day

How many goals your team makes

Have fun making pictures for each!

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A Pictograph is a way of showing data using images. Each image stands for a certain number of things. Here is a pictograph of how many apples were sold at the local shop over 4 months: Note that each picture of an apple means 10 apples (and the half-apple picture means 5 apples).