2. The manufacturers of a newr running shoe, Blast Off, claim that a new insole material acts as a springboard, launching the runner forward with ever}.r step. Researchers would like to determine if there is a difference in the mean speed for runners wearing Blast Off compared to a traditional shoe. They plan to conduct a study.r with l'l} runners. A random sample of 50 male runners who report that the)? wear the shoe, Blast Off, and random sample of SCI male runners that run with other shoes will be selected. The researchers as]: each of the 1m runners for their fastest lmile time on a track and recorded the responses. The}; will then compare the mean running speed for the two groups. (a) Is this an observational study or an experiment? Explain