Posted by **Jose** on Sunday, January 23, 2011 at 3:13am.

A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95%

Sample A: 40.3 37.5 37 41.7 29.8 33.5

31.3 33.9 34.7 30.3 39.8 40.9 32.7 39.2

38.4 25.1 32.2 38 32.8 31.8

Sample B: 46.9 47.6 41.6 41.3 36.5 39.8

45.3 43.1 42.1 36.8 46.4 41.2 47.3 45.5

34.9 41.0 37.3 42.7 38.0 35.7 34.6 38.0

41.0 41.6 Assume That the two Populations Are Normally Distributed.

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