Answer
$F_{0.90,25,20} = 0.58$
Work Step by Step
Here we have α = 0.10, df (numerator) = 45, df (denominator) = 15
For the critical value of the left tail: 1-α = 0.90
Using the F-distribution table for the given values, we have:
$F_{0.90,25,20} = 0.58$
