What is the Null and alternative hypothesis, p-value, and conclusion?

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 micrograms per liter of wine (ug/L). The untrained noses of consumers may be less sensitive, however. The DMS odor thresholds for 10 untrained students was 29.4 (ug/L). Assume that the odor threshold for untrained noses is Normally distributed with o = 7 ug/L. Is there evidence that the mean threshold for untrained tasters is greater than 25 ug/L? What is the- Null and alternative hypothesis. P-value Conclusion