HW 7: Problem 14 Previous Problem Problem List Next Problem (1 point) The nicotine content in cigarettes of a certain brand is normally distributed with mean (in milligrams) / and standard deviation o = 0.1. The brand advertises that the mean nicotine content of their cigarettes is 1.5 mg. Now, suppose a reporter wants to test whether the mean nicotine content is actually higher than advertised. He takes measurements from a SRS of 20 cigarettes of this brand. The sample yields an average of 1.55 mg of nicotine. Conduct a test using a significance level of a = 0.1. Round off your answers to two decimal places where appropriate. (a) The test statistic (b) The critical value, z* = (c) The final conclusion is A. The nicotine content is probably higher than advertised. O B. There is not sufficient evidence to show that the ad is misleading. Note: You can earn partial credit on this