Casio FX-9750GII - SOFTWARE VERSION 2-00 Manuale d'uso - Pagina 4

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2010 Back-To-School - Statistics SneakPeek

The example we have just done uses categorical data. The choices such as dog and cat are categories, and

the values we used are counts, because we counted how many people had that type of pet. Now we are

going to use quantitative data, where we get values that are more like measurements than counts. Suppose

we record the height for you and eight of your friends and we get these nine values:

63, 64, 64, 65, 66, 67, 68, 68, 70

Press

to return to the List editor and put these

values in List1.

∑

Use SET to make a new type of graph. Use

to Graph Type. This time we don't see the type we

want. Notice the arrow above F6? That means there

are more choices. Press u.

∏

"The dangerous, poisonous snake Hist at them!"

Well, not quite. Hist stands for histogram. It's like a

bar chart, but a better choice for quantitative data.

Move down to Graph Type and press q. Check that

the next row shows List1. Press

A window opens up to help us make a nice graph.

Use a number smaller than those in our list, like 60,

for Start. Use 1 for Width. Width means the width of

each rectangle in our histogram. Our height values

are very close to one another so 1 is a good choice.

Press

to see the graph.

∫

Box and whisker? That's a joke right? Actually, no.

It is the name that statisticians use for another kind of

plot, although, sometimes it is called a boxplot. If

you are going to make these, your teacher will ex-

plain the details. For now, for a little extra practice,

change your graph by using the Graph Type Box.

to go

and q.

Featuring the Casio fx-9750GII