Casio FX-9750GII - SOFTWARE VERSION 2-00 Panduan Pengguna - Halaman 5

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Casio FX-9750GII - SOFTWARE VERSION 2-00 Panduan Pengguna

2010 Back-To-School - Statistics SneakPeek

Let's do one more thing with these data. Press

couple of times to return to the List Editor, and the

GRPH soft key. Look next to it. There's CALC.

Well, it is a calculator, right? It should be able to cal-

culate. We actually get a lot of calculating. Press

and then

for 1Var (because we have only one

variable, the heights). We get a lot of information

about our data, like the mean (or average). Press

to scroll down and see even more, like the median and

the maximum values.

Sometimes we work with paired data. As the name suggests we have two variables that we believe are

associated. For example, you may have heard something like this: if you extend your arms straight out

parallel to the floor, and measure fingertip to fingertip, it is about the same as your height. Suppose we did

this with you and your eight friends. Now each person has a pair of numbers, height and arm span.

We can check out this theory. Let's suppose the measurements are:

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

It would be important to know that the numbers are

matched up, that is the first number in the list is for the

same person as the first number in the height list.

Return to the list editor and put these values in List2.

Press q(GRPH) and then

∑

Scat! Trying to chase that cat away? The Cat in the

Hat, maybe? Fox in Socks? OK, probably not. Scat

stands for scatterplot and we make one to see a pic-

ture of our pairs. It's just like plotting points in Alge-

bra class. Change the Graph Type. Also make sure

List1 and List2 are selected. You can even choose the

size of your points with Mark Type.

to set up a graph.

Featuring the Casio fx-9750GII