This Wine Stinks. Sulfur compounds cause "off-odors" in wine, so winemakers want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for dimethyl sulfide (DMS) in trained wine tasters is about 25 milligrams per liter of wine ( μg/l ). The untrained noses of consumers may be less sensitive, however. Here are the DMS odor thresholds for 10 untrained students: 31, 31, 43, 36, 23, 34, 32, 30, 20, 24, A. Assume that the standard deviation of the odor threshold for untrained noses is known to be σ = 7 μg/l. Briefly discuss the other two "simple conditions", using a stemplot to verify that the distribution is roughly symmetric with no outliers. B. Give a 95% confidence interval for the mean DMS odor threshold among all students.
This Wine Stinks. Sulfur compounds cause "off-odors" in wine, so winemakers want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for dimethyl sulfide (DMS) in trained wine tasters is about 25 milligrams per liter of wine ( μg/l ). The untrained noses of consumers may be less sensitive, however. Here are the DMS odor thresholds for 10 untrained students:
31, 31, 43, 36, 23, 34, 32, 30, 20, 24,
A. Assume that the standard deviation of the odor threshold for untrained noses is known to be σ = 7 μg/l. Briefly discuss the other two "simple conditions", using a stemplot to verify that the distribution is roughly symmetric with no outliers.
B. Give a 95% confidence interval for the mean DMS odor threshold among all students.
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