Question: Sulfur Compounds cause "off-odors" in wine, so winemakers wan to know the odor threshold, the lowest concentration that the human nose can detect. The odor threshold for sulfide (DMS) in trained wine tasters is about 25 Micrograms pet -liter of wine. 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

1. Assume that the standard deviation of the odor threshold for untrained noses is known to be \(\sigma \) = 7 Briefly discuss the other two "simple conditions using a stemplot to verify that the distribution is roughly symmetric with no outliers
2. Following the four-step process, give n 95% confidence interval for the mean DMS odor threshold among all students.

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