The nicotine content in cigarettes of a certain brand is normally distributed with mean (in milligrams) m and standard deviation s = 0.1. the brand advertises that the mean nicotine content of their cigarettes is 1.5, but measurements on a random sample of 400 cigarettes of this brand gave a mean of x = 1.52. is this evidence that the mean nicotine content is actually higher than advertised? to answer this, test the hypotheses h0: m = 1.5, ha: m > 1.5 at significance level a = 0.01. you conclude a) that h0 should be rejected. b) that h0 should not be rejected. c) that ha should be rejected. d) that there is a 5% chance that the null hypothesis is true.