Assume that. a simple random sample has been selected from a normally distributed population and test the given claim. identify the null and altemative hypotheses tat statistic, P—value‘ and state the final conclusion that. addresses
the original claim A simple random sample of 25 ?ltered 100 mm cigarettes is obtained. and the tar content of each cigarette is measured. The sample has a mean of19.6 mg and a standard deviation oi 3.18 mg Use a 0.05 signi?cance level to test
the claim that the mean tar content ot?itered 1m] mm cigaretles is less than 21 1 mg, which is the mean for un?llered king size cigaret‘lec, What do Ihe results suggest, if anything, almut Ihe e?ectivensss of the ?lters?
What is the P-vaue?
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