e accompanying data set lists full IQ scores for a random sample of subjects with medium lead levels in their blood and another random sample of subjects with high lead levels in their blood. Use a 0.01 significance level to test the claim that IQ scores of subjects with medium lead levels vary more than IQ scores of subjects with high lead levels. A. H 0
:σ 1
2
=σ 2
2
B. H 0
:σ 1
2
=σ 2
2
H 1
:σ 1
2
<σ 2
2
H 1
:σ 1
2
>σ 2
2
c. H 0
:σ 1
2
=σ 2
2
D. H 0
:σ 1
2
=σ 2
2
H 1
:σ 1
2
=σ 2
2
H 1
:σ 1
2
=σ 2
2
Identify the test statistic. The test statistic is
