Determine what the key terms refer to in the following study. A fitness center is interested in the mean amount of time a client exercises in the center each week. Variable Data Sample -- Population V Statistic Parameter 1. A group of clients at the fitness center. 2. The mean amount of time clients spend exercising in the fitness center each week in the sample. The amount of time spent exercising by clients in the fitness center each week. Examples of the data are 3. 1, 2, and 3 hours. 4. The mean amount of time clients spend exercising in the fitness center each week. 5. X = the amount of time one client spends exercising in the fitness center each week. 6. All clients at the fitness center