For each question, identify the appropriate statistical scenario described in the problem background. Background: A local gym offers a variety of fitness classes, one of these being Cardio Crash – a class designed to get participants’ heart rates up. Workout instructors would like to learn more about the average difference in heart rate during the class. They record each participant's heart rate before the class begins and midway through the workout routine. 1 point Single population proportion Difference in two population proportions Single population mean Population mean difference for paired data Difference in two population means