The estimator of 
used in the inference regarding the ratio of two population variances is 
.
Definitions:
Test-Statistic
A value calculated from sample data during a hypothesis test, used to decide whether to reject the null hypothesis.
P-Value
The probability of obtaining a test statistic at least as extreme as the one observed, under the assumption that the null hypothesis is true, used in hypothesis testing to determine statistical significance.
Degrees Of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution or test without violating any constraint.
P-Value
It calculates the probability that the observed differences between groups in a study could have happened by chance, used in hypothesis testing.
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