Student's T Probability Lower Tail - HP 10bII+ User Manual

Student's T Probability Lower Tail

To calculate the area under the Student's T Distribution curve, first enter the degrees of
freedom, followed by the t-value. It is a two-number function, so it may be entered as either
an in-line function, or by using
Example:
What is the lower tail probability associated with a Student's T distribution with 8 degrees of
freedom (df ) with a t-value of
1
Table 12-21 Example of Student's t (lower tail)
Keys
g]IJ7gSy4
Æ
:
or, using
gÆJ7gSy]I
Figure 12
Figure 1 1
Æ
.
1 .86?
-
Display
.0499653
Description
Calculates the lower tail
probability.
Returns the same results.
Figure 13
Statistical Calculations 131