Answer: 3.07 and 0.357
Step-by-step explanation:
To solve the problems above, we use the F- distribution or statistic to test the equality of variance in a two tailed test.
We can employ the excel function :
F.INV.RT(alpha, deg_of _freedom1, deg_of_freedom2) to get the right tail and
F. INV(alpha, deg_of _freedom1, deg_of_freedom2)
alpha = 0.1
For a two tailed test ;
Alpha = 0.1 ÷ 2 = 0.05
Deg_of freedom1 = (number of observation1 - 1)
Deg_of freedom1 = 13 - 1 = 12
Deg_of freedom2 = (number of observation2 - 1)
Deg_of freedom2 = 10 - 1 = 9
Right tail:
F.INV.RT(0.05,12,9) = 3.07
F.INV(0.05,12,9) = 0.357
