Question: 13.49 This wine stinks. Are untrained students less lili sensitive on the average than trained tasters in detect ing off-odors in wine? Exercise 13.47 gives

13.49 This wine stinks. Are untrained students less lili sensitive on the average than trained tasters in detect ing "off-odors" in wine? Exercise 13.47 gives the lowest lev els of dimethyl sulfide (DMS) that 10 students could detect.

The units are micrograms of DMS per liter of wine (/xg/1). As sume that the odor threshold for untrained noses is Normally distributed with o = 1 /Ug/1. Is there evidence that the mean threshold for untrained tasters is greater than 25 /xg/1?

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