4.Press K, select the RUN • MAT (or RUN) mode, press *(E)(PROB)

((PROB) on the fx-7400GII) to recall the probability calculation (PROB) menu.

(PROB)*(E)(t() @E?DU

 

 

* fx-7400GII: (PROB)

 

 

(Normalized variate t for 160.5 cm)

Result: –1.633855948

 

 

( –1.634)

(t() @FDDU

 

 

(Normalized variate t for 175.5 cm)

Result:

0.4963343361

 

 

( 0.496)

(P()?CHE

 

 

(P() @EBCU

 

 

(Percentage of total)

Result:

0.638921

 

 

(63.9% of total)

(R()?CHEU

 

 

(Percentile)

Result:

0.30995

 

(31.0 percentile)

IDrawing a Normal Probability Distribution Graph

You can draw a normal probability distribution graph using manual graphing with the RUN • MAT (or RUN) mode.

1.From the Main Menu, enter the RUN • MAT (or RUN) mode.

2.Input the commands to draw a rectangular coordinate graph.

3.Input the probability value.

Example

To draw a normal probability P (0.5) graph.

KRUN • MAT (or RUN)

(SKTCH)(Cls)U

(GRPH)(Y=)

*(E)(PROB)*(E)(P()?DU

* fx-7400GII: (PROB)

ICalculations Using the Distribution Function

Important!

• The following operations cannot be performed on the fx-7400GII.

You can use special functions in the RUN • MAT mode or PRGM mode to perform calculations that are the same as the STAT mode distribution function calculation (page 6-38).

Example

To calculate normal probability distribution in the RUN • MAT mode for

 

the data {1, 2, 3}, when the population standard deviation is Σ = 1.5 and

 

the population mean is ƫ = 2.

 

6-20