How i use fx-570ES to calculate the normal distribution? For others, is select SD --> shift 3 --> P(...).

The median is the number is the middle.

Using the calculator, you can follow the Statistical Calculations (Stat) on pages 22 and 23 of the attached manual. http://support.casio.com/pdf/004/fx-570_991ES_PLUS_E.pdf

However, it might be quicker to just put the numbers is order from lowest to highest and pick out the number in the middle.

For example, take the numbers 3, 5, 4, 7, 6, 4, 9.

Putting them in order, we get 3, 4, 4, 5, 6, 7, 9

There are 7 numbers so we want the 4th number (3 numbers to the right and 3 numbers to the left). In this case, the 4th number is 5 and that is our median, as half the numbers are lower than it and half the numbers are higher than it. It the number of numbers is even, you take the average of the two middle numbers.

Good luck,

Paul

The statistical display menu choices depend on the type of statistical calculations you intend to do. Please Read the manual. Note: When you finish entering data press AC key and renter the stat mode.

Press MODE 3 AC to enter the statistics mode. Press SHIFT STAT 7 to bring up the distribution menu then 1 to invoke P( .

Get the Plus. It adds a few functions, takes nothing away, and is the same price at most vendors.

Here is an example. Instead of SIN(X) insert your polynomials.

The syntax of the command is

where function is the expression you are differentiating
x is the value of variable x at which you are evaluating the derivative, and tol is the tolerance (the error) you are willing to tolerate in the result.

If you do not want to specify a tolerance just omit the last comma and tol.

To enter the command d/dx you use key sequence [SHIFT][Integral]
To enter the symbol x in the expression you press [ALPHA][ ) ]
To enter a comma you use [SHIFT] [ ) ]
To enter a power of 10 in the tolerance use [x10^X] key

Example : Calculate

The key sequence is as follows
[SHIFT] [Integral] 3 [ALPHA] [ ) ] [X^2] [-] 5 [ALPHA] [ ) ] +2 [SHIFT] [ ) ] 2 [SHIFT] [ ) ] 1 [x10^X] [(-)] 12 ) [=]

DO NOT confuse [SHIFT] [ ) ] which enters the comma and [ALPHA] [ ) ] which enters the variable X.

The common antilog is the shifted function of the "log" key, marked "10^x". The natural antilog is the shifted function of the "ln" key, marked "e^x".

Note that this I'm using a Casio fx-991MS calculator.

I'm also assuming you're asking about the z value i.e. P(t)

You first need to go to SD mode, which is done by pressing Mode button twice where you'll get the choices as follows:
SD REG BASE
1 2 3
Press Numeral 1. you should see a small sd icon on the top of the display after you press 1.

Now enter Shift key + '3' i.e. Shift + DISTR and you'll get the options as follows:

P( Q( R( t->
1 2 3 4

Choose whichever is required.
Hope this is what you were asking about.

The following screen captures are from another Casio Graphing calculator so the menu screen may not look yours. However the instructions are identical.

Here is a sequence of screen captures to illustrate how to do it.
Turn calculator ON. Use arrow to highlight STAT and press EXE



Press F5 DIST


Then select F3 CHI


Choose Cpd or Ccd


If you choose Cpd : you must enter the Chi value you want, and press EXE, then the number of degrees of freedom (df) and press EXE. The Execute command is highlighted. This allows you to perform the actions
indicated by the Thumbnails at the bottom of the screen: calculate a value or Draw the distribution.






In the example above I took Chi=1, and df=3 and pressed the CALC menu.

If I press the DRAW menu instead, the distribution is displayed.


If you want the other distribution Ccd, press Ccd instead in screen capture 4.

I don't know about fx-9750gII, but for fx-991MS
Change the mode to REG
Then
Shift->3(DISTR)->1(P())->give your Z value

Hello,
Not knowing what kind of probability calculations you want to perform, I can only show you how to access the distributions that this calculator has to offer.
After you enter your data and do the usual statistics, you press SHIFT STAT and select 7:Distr. You get acces to
1: P(
2:Q(
3:R( and
4: X to t, the variate.

See the exemples in the Appendix to the user's manual, in particular #059.

Hope it helps.