Answer:
The reason is that the f ratio is balanced due to the numerator and denominator having equal sources of variability.
Step-by-step explanation:
The expected value of an F ratio is 1.00 when the null hypothesis is true because in a scenario where there is no treatment effect, we have both the numerator and the denominator of the F ratio both measuring equal sources of variability.
Whenever this happens then the F ratio will be balanced and also it will have a value that is near 1.00.