The untrained noses of consumers may be less sensitive, however. Here are the DMS thresholds for 10 untrained shoppers: 30 30 42 35 22 33 31 29 19 23 Assume that the odor threshold for untrained noses is Normally distributed with o = 7 µg/L. Do the data provide evidence at the a = 1% level that the mean DMS threshold for untrained tasters is greater than 25 µg/L?

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