In an experiment, a track and field coach randomly assigned 10 of his athletes to watch a two-minute video of top Olympic discus throws and the remaining 11 athletes to a control group that watched a two-minute video about nutrition. 4. Explain what it means if the nulll hypothesis is true. If millions of athletes like these watched a two-minute vidoe of top Olympic discus throw and millions of athletes like these watched a two-minute video about nutrition, the mean difference of discus throws for each group would not be the same. If millions of athletes like these watched a two-minute vidoe of top Olympic discus throws and millions of athletes like these watched a two-minute video about nutrition, the mean difference of discus throws for each group would be the same. *