An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatographic (GC) method. The same sample is analyzed several times by both methods with the following results (% ethanol). Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3, 14.3. GC method: 13.5, 13.3, 13.0, 12.9. a. (10 pts.) Can 14.3% ethanol of the results obtained from the enzymatic method be discarded as due to accidental error at the 95% confidence level? b. (20 pts.) Does the enzymatic method give the same value as the GC method at the 95% confidence level?