6-7-7

Distribution

kStudent-tDistribution

u Student-tProbability Density

Student-tprobability density calculates t probability density from a specified x value.

 

 

 

 

 

 

 

 

2

–

df +1

 

Γ

df + 1

1+

x

2

 

 

 

 

 

 

f (x) =

 

 

2

 

 

 

df

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Γ

df

 

 

π df

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Perform the following key operations from the statistical data list.

5(DIST)

2(t)

1(tpd)

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

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

data

df .................................

degrees of freedom (df > 0)

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

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

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

executes a calculation or draws a graph

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 ..................................

Student-tprobability density

#Current V-Window settings are used for graph drawing when the Setup screen's [Stat Wind] setting is [Manual]. The V-Window settings below are set automatically

when the [Stat Wind] setting is [Auto]. Xmin = –3.2, Xmax = 3.2, Xscale = 1, Ymin = –0.1, Ymax = 0.45, Yscale = 0.1

20050401