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20050501
7-11-4
Distribution
Calculation Result Output
x : inverse cumulative normal distribution
(Upper integration interval boundary when Tail:Left)
(Lower integration interval boundary when Tail:Right)
(Upper and lower integration interval boundaries when Tail:Central)
k t Distribution
Student-t Probability Density
Command: TPD 䡺
Description: This command calculates t probability density from a specified x value.
f
(x) =
Γ
Γ
.
df
π
–
df+1
2
2
df
2
df + 1
df
x
2
1+
Command Syntax
x value, df value
Definition of Terms
x : data value
df : degrees of freedom (df > 0)
Input Example:
TPD 1.5,6
Calculation Result Output
p : Student-t probability density
Student-t Distribution Probability
Command: TCD䡺
Description: This command calculates the probability of the Student-t distribution data
falling between a and b.
p =
Γ
Γ
.
df
π
2
df
2
df + 1
–
df+1
2
df
x
2
1+
dx
a
b
a : lower boundary (Lower)
b : upper boundary (Upper)
Command Syntax
Lower value, Upper value, df value
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