"18.42 This Wine Stinks. How sensitive are the untrained noses of students? Exercise 16.27 (page 381) gives the lowest levels of dimethyl sulfide (DMS) that 10 students could detect. You want to estimate the mean DMS odor threshold among all students, and you would be satisfied to estimate the mean to within 0.1 with 99% confidence. The standard deviation of the odor threshold for untrained noses is known to be = 7 micrograms per liter of wine. How large an SRS of untrained students do you need?"