Researchers Gathered Data on a Health-Enhancing Program

Researchers gathered data on a health-enhancing program.The data indicated that the program had worked well inproducing behavioral changes. By the end of the program, the majority of the program participants were exercising more hours per week, and far fewer participants were leading inactive lives. A frequency polygon of the data at the end of the program:

A) would have very high z scores.
B) would be negatively skewed.
C) would be positively skewed.
D) would resemble the standard normal curve.