Assume that a simple random sample has been selected from a normally distributed

Question

Assume that a simple random sample has been selected from a normally distributed polution and test the given claim. Identify the null and alterntive hypothesis, test statistic, P-value, and state the final conclusion that addresses the original claim.

The simple random sample fo 25 filtered 100 mm cigarettes is obtained, and the tar content of each cigarette is measured. The sample has a mea of 19.8 mg and a standarf deviation of 3.23 mg. Use a 0.05 significance level to test the claim that the mean tar content of filtered 100 mg cigarettes is less than mg, which is the mean of unfiltered king size cigarettes. What do the results suggest, if anything, about the effectiveness of the filters?

Explanation / Answer

Assume that a simple random sample has been selected from a normally distributed

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