A group of wine enthusiasts taste-tested a pinot noir wine from Oregon. The evaluation was to grade the wine on a 0 to 100 -point scale. The results follow: Stem-and-Leaf of Point of Scale n=40 Leaf unit =0.10,830 represents 83.0 (a) Calculate the sample mean. Round answer to 2 decimal places. (b) Calculate the sample median. State answer exactly. (c) Calculate the sample variance. Round answer to 3 decimal places. (d) Calculate the sample standard deviation. Round answer to 3 decimal places. (e) A wine rated above 90 is considered truly exceptional. What proportion of the taste-testers considered this particular pinot noir truly exceptional? State answer exactly. % Statistical Tables and Charts