6-7-3

Distribution

k Normal Distributionu Normal Probability Density

Normal probability density calculates the probability density of nomal distribution from a specified x value. Normal probability density is applied to standard normal distribution.

f(x) =

1

 

e

(x μ)2

(σ > 0)

 

2σ 2

 

 

 

 

 

2πσ

 

 

 

 

 

 

Perform the following key operations from the statistical data list.

5(DIST)

1(NORM)

1(Npd)

Data is specified using parameter specification. The following shows the meaning of each item.

x .................................

data

σ .................................

standard deviation (σ > 0)

μ .................................

mean

Save Res ....................

list for storage of calculation results (None or List 1 to 26)

Execute .......................

executes a calculation or draws a graph

• Specifying σ = 1 and μ = 0 specifies standard normal distribution.

After setting all the parameters, use c to move the highlighting to “Execute” and then press one of the function keys shown below to perform the calculation or draw the graph.

1(CALC) ... Performs the calculation.

6(DRAW) ... Draws the graph.

Calculation Result Output Example

 

 

p .................................

normal probability density

 

 

 

 

 

 

# V-Window settings for graph drawing are set

settings are used for graph drawing when the

 

 

 

 

automatically when the Setup screen’s [Stat

[Stat Wind] setting is [Manual].

 

 

Wind] setting is [Auto]. Current V-Window

 

 

 

 

 

 

20070201