Need help with 5 part question on a study guide.A scientist is interested in whether stretching before running 5 Kilometers will improve a runners time. The scientist decides that an experimental study is the best method to use to answer the question. One group of runners will run a 5 kilometer race without stretching, and a second group of runners will follow a specific stretching routine before running the race. The finishing times will be recorded, along with the group type for each runner.A. Explain why an experimental study would be better than a survey or observational study in this situation B. The scientist is able to get 200 adults of varying running abilities to participate in the study. Describe a way that would assign people into the two groups that would allow the scientist to answer the question of interest.C. Graph included with picture D. Assuming this group is representative of all adults who followed a specific stretching routine before running use a normal distribution to estimate the probability that a randomly selected adult could complete the race in fewer than 20 minutes after stretching. Explain your reasoning.E. The group that raced without stretching has a mean finish time of 23.5 minutes and a standard deviation of 2.6 minutes. Write a sentence or two that summarizes any conclusions that can be made about the statistical question “does stretching before a race improve a runners time?
