Hey mathematicians.

I have an assignment where i have a table of the air pollution in melbourne and houston.

City.......................USS...................S ..........n

1. Melbourne.........76951,65............947,7....... 13

2. Houston..........118811,59...........1307,2......1 6

They are both normal-distributed (or however you say that.)

Now i have to show by test that we can assume the variance of Melbourne and Houston are the same.

I have understood how to test it.

and

Thats how far ive gotten till now, and its pretty easy. What stops me is that i dont know how to find the part.

I have a book of tables, where i can find , but apparently i dont know how to use it.

Could someone explain to me how to find it, or point me in the direction of a "guide"?..

If not, then id like the answer to , then i can just ask someone at the university to explain to me how it works.

Thanks in advance.

Morten