The Let’s Get Physical Group operates fitness training courses for corporations which they suggest increases productivity and morale of employees. At their Boot Camps, one session includes a short physical training course which has an average completion time of 7 minutes with a standard deviation of 0.75 minutes. Let’s Get Physical Group has received complaints from a number of companies who say that the time taken to finish this particular training course is longer than suggested. In order to evaluate these complaints, Let’s Get Physical Group take a random sample of 25 of their customer records from the previous six month period which detail the time taken by people to finish this particular physical training course.
a. What is the population we can draw conclusions about in this study?