11) Two types of flares are tested for their burning times (in minutes) and sample results are given
below. Use a 0.05 significance level to test the claim that the two brands have equal variances.
Brand X               Brand Y
n = 31                  n = 41
x-bar = 19.4         x-bar = 15.1
s = 1.4                 s = 0.8
A) Test statistic: F = 3.0625. Critical value: F = 1.9429.
B) Test statistic: F = 3.0625. Critical value: F = 2.0090.
C) Test statistic: F = 1.7500. Critical value: F = 1.7444.
D) Test statistic: F = 1.7500. Critical value: F = 1.9429.
E) Test statistic: F = 3.0625. Critical value: F = 1.7444.