rigisd od gisponr nem le egao bai ( A simple random sample of 27 filtered 100 mm cigarettes is obtained and the tar content of each cigarette is mentioned. The sample has a mean of 19.2 mg and a...

Extracted text: rigisd od gisponr nem le egao bai ( A simple random sample of 27 filtered 100 mm cigarettes is obtained and the tar content of each cigarette is mentioned. The sample has a mean of 19.2 mg and a standard deviation of 2.2mg. Use a .05 level of significance to test the claim that the mean tar content of 100 cigarettes is less than 21.2 mg (which is the mean for king size cigarettes). What do the results suggest about the effectiveness of the filters? e he lo N0 ar oll obulaxs ot banado er