20090601
S
Program, eActivity or Main Application
Command: TPD
:
Command Syntax
x
value,
df
value
Input Example:
TPD 2,5
Student-
t
Cumulative Distribution
Menu: [Distribution]-[Student-T CD]
Description: This command calculates the probability of the Student-
t
distribution data
falling between
a
and
b
.
p =
.
df
2
df
2
df + 1
–
df+1
2
df
x
2
1+
dx
a
b
a
: lower bound (Lower)
b
: upper bound (Upper)
Definition of Terms
Lower : lower bound
Upper : upper bound
df
: degrees of freedom (
df
> 0)
Calculation Result Output
prob
: Student-
t
distribution probability
p
t
Low : lower bound value you input
t
Up : upper bound value you input
Example
Lower bound : 1.5 (upper bound :
d
)
Degrees of freedom : 18
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Distribution].
(2) Select [Student-T CD] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
(5) To display the graph, tap
.
7-11-7
Distributions
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