## Friday, 22 March 2013

### Data Handling: Choice of Graphs by Seraphina Chia

Data Handling
• Can you identify the one that is not appropriate?
• Why do you think it's not appropriate?
• What makes you think the 3 remaining graphs are appropriate?

I think that using the Pie Chart to represent the information is not appropriate.

I think that it is not appropriate because the pie charts shows only the angles/parts of each weather. From the pie chart, we only know which weather occurs more frequently than the others. We do not know how many times the weather occurred exactly. (We are more interested to know about the number of times each weather occurred and not about the differences in the weathers that occurred.)

The 3 remaining graphs are appropriate because they also display the number of times each weather occurred, which is the information that we want to know.

#### 1 comment:

1. Pie chart shows the 'proportion', which tells us how often each type of weather occurs by the size of each pie. So, it's still appropriate.

There are situations when we do not require the exact figures, but just need to tell the 'size' of occurrence at a glance. That's where pie chart is useful.

So, which graph is inappropriate, and why?