[leeand00]

If you add the frequency of each slice of a pie chart together, you should get 100%

- page 8 - Head First Statistics

and later on the same page I read...

Frequency describes how many items there are in a particular group or interval

- page 8 - Head First Statistics

So which is it? I'm guessing the second one since,

27,500 + 11,500 + 6,000 + 3,500 + 1,500 = does not equal 100%?

Or is the text saying that the sum of the frequency of all of the slices in the pie chart sum to 100% in total?

[leeand00]

When I tried to change the title of this post, my message was quote:

[quote]Sent to hell...[/quote]

What?[/quote]

[RavenHawk]

What the book meant was that the pie chart takes into account 100% of all your data, ie nothing has been left out or not accounted for. If you were to convert the figures into a proportion or percentage of the whole then the sum of each slice will equal 100%.