Cigarette Filters and Nicotine Listed below are statistics from measured nicotine contents of randomly selected filtered and non-filtered king-size cigarettes (based on data from the Federal Trade Commission). Use a 0.05 significance level to test the claim that king-size cigarettes with filters have amounts of nicotine that vary more than the amounts of nicotine in non-filtered king-size cigarettes.

Filtered Kings n = 21, x = 0.94 mg, s = 0.31 mg Non@filtered Kings n = 8, x = 1.65 mg, s = 0.16 mg