The State of Florida severely cut funding for the TRUTH campaign (advertising

which is aimed at teenagers to reduce smoking). Advocates claim that TRUTH

reduces teen smoking. To demonstrate this, they provide two separate samples of the

state's high school students reporting their number of cigarettes smoked per day two

years before (nine students) and two years after the start of TRUTH (eight students).

Before TRUTH: 5, 5, 8, 0, 0, 10, 0, 4, 10

After TRUTH: 6, 0, 6, 7, 0, 0, 2, 5

• Provide the null and alternative hypotheses in formal and plain language for appropriate two-tailed test (viz., dependent or independent) at the 0.05 significance level
• Do the math and reject/accept null at a=.05. State your critical t value.
• Explain the results in plain language.
• Calculate the 95% confidence interval for the difference in means and state both formally and in plain language if appropriate.

I'm not sure even where to start..