What is the significance of calculating a mean, standard deviation, and percent error

When organisms convert from of energy, what usually results

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.