The mean nicotine content of a brand of cigarettes is 20.0 mg. A new process isproposed to lower the content without affecting the flavor. To test the new process,a sample of 16 cigarettes is taken from the weeks' output of the test plant. Thesample mean nicotine content is 18.5 mg, The standard deviation of the samplenicotine content is 2 mg, Is the claim of the new process justified? Use 5% level ofsignificance