Question

I am trying to compare the variability in the filament diameter for this data set. I know I need to use an F-test.

the degrees of freedom is: 168

Run #1 : 0.00134 Run #2 0.00168 Interpertation:

Can someone help me with this and explain the interpertation ?

Answer 1

Above outputs are the P value. When you are doing a test (F- Test) then you have the clearly defined Null hypothesis and Alternative hypothesis. Based on the P value which you are getting as output, you could take a decision that would you reject the null hypothesis or accept the null hypothesis.

Generally if we consider the 95% confidence level, in that case if P value is less than 0.05 then we reject the null hypothesis and accept the alternative hypothesis.