Casio ALGEBRA FX 2.0 Examples Manual page 21

Example There are two possible routes to get to the airport from a certain
company, and so manager wants to determine which route is the
fastest in order to make a plane that leaves at 7 o'clock. One route was
researched five times and then the other route was researched five
times, producing the data shown below.
mean of x1 = 33.8min mean of x2 = 34.2min
x1
n
-1
Test the null hypothesis that the two routes have the same travel time
variance using the level of significance of 0.10.
Procedure
1 m STAT2
2 3(TEST) e( F)
3 2(VAR) c
1( ) c
bg.ew
fw
g.bw
fw
1(None) c
4 1(CALC)
6(DRAW)
Result Screen
Since P = 0.08144232 < 0.1 (level of significance), we can reject the null hypothesis and
conclude that two routes don't have same travel time variance.
21
examples
= 16.4min x2
n
-1
= 6.1min