>error #14 (undefined) ... sends me to this line: xbar xStat
>
xbar and ybar are simple variables; they cannot be used before you define
them...
This means that you need to do a TwoVar xStat, yStat before you can use
them - same with the other statistical variables.
You can also type the lists directly e.g. TwoVar {1,2,3},{4,5,6}
Kasper