Discussion:
Use 0.05 significance level to test the claim. Assume the populations are normally distributed.
Claim: Super filter filtered water varies more in unfiltered particulates than trusty filter filtered water.
Super filter: n1 = 16, x- bar = 0.02, standard deviation = 0.0045
Trusty Filter: n2 = 16, x- bar =0.02 , standard deviation = 0.0028
Calculate test statistic, critical value and conclusion