A statistics class has an average score of 78.3 and a standard deviation of 12.4. What percentage of samples of size 36 would have an average less than 72? O a. 3.04% O b. 0.12% O c. 99.88% O d. 50.8% QUESTION 2 2 points Sav CH7 Norm 2: Healthy human body temperatures are normally distributed with a mean of 98.6 degrees f and a standard deviation of 0.28 degrees F. What percent of samples of size 49 would have an average temperature above 98.7 degrees F? O a. 0.62% O b. 2.5% O c. 25% O d. 99.38% QUESTION 3 2 points Save A CH7 Norm 1c