I want to conclude my discussion of probability distributions

with a brief mention of some other distributions.

And these are mentioned in the reference handbook, so

I'll include them briefly here.

And one common one is the so called T distribution,

which arises from families of normally distributed populations of

small samples sizes whose standard deviations are unknown.

And the equation for the T distribution is given here

in this x track which you can see is rather involved.

And similarly, the T distribution, this is graphed over on the right hand side here.

This is called either the T distribution or the students' T distribution.

The T test is useful, and it can be used to compare

two data sets to determine if they are statistically different.

However, I think that this is unlikely to arise in the FE exam.