Question

For H0 and H1 with 0.05 alpha,

H0: Variance of weights made by machine1 = Variance of weights made by machine 2

H1:Variance of weights made by machine1 > Variance of weights made by machine 2

We have the following outputs.

Sample size of data from machine 1 = 30

Sample size of data from machine 2 = 20

F statistics = 3.45

Which one is the correct one?

	a.	Since F stat (3.45) is not larger than upper critical value (4.357), do not reject H0. Thus there is no evidence that Variance of weights made by machine1 > Variance of weights made by machine 2.
	b.	Since F stat (3.45) is larger than upper critical value (2.077), reject H0. Thus there is no evidence that Variance of weights made by machine1 > Variance of weights made by machine 2.
	c.	Since F stat (3.45) is not larger than upper critical value (4.357), do not reject H0. Thus there is evidence that Variance of weights made by machine1 > Variance of weights made by machine 2.
	d.	Since F stat (3.45) is larger than upper critical value (2.077), reject H0. Thus there is evidence that Variance of weights made by machine1 > Variance of weights made by machine 2.

Answer 1