Answer:
(a) Increase the differences between the sample means this will increase the Numerator.
(b) Increase the sample variances will increase the denominator.
Step-by-step explanation: Â
F Ratio = Variance between treatments/ Variance within treatments. Â
Here, Â
(a) Increase the differences between the sample means: Â
 - Will increase the Numerator and Â
 - Size of the F-ratio would increase Â
(b) Increase the sample variances: Â
 - Will increase the denominator and Â
 - Size of the F Ratio would decrease.