You collected data on a disease that affects elderly the most. Most of the patients are aged over 70 while only a handful are under the age of 50. Which of the following is more appropriate to measure the center of the distribution of the ages of patients?

A. Mean

C. Standard deviation

B. Median

D. Variance

3. The average exam score of a statistics class is 78. The standardized value of Toni's exam score in that class is positive. Which of the following is true?

A. Tonie's performance was above the class average.

B. Tonie's performance was below the class average

C. Tonie's performance was the same as the class average.

D. Not enough information to determine.