A recent article in a college newspaper stated that college students get an average of 7.2 hrs of sleep each night. A student who was skeptical about this value decided to conduct a survey by randomly sampling 21 students. On average, the sampled students slept 6.8 hours per night. Identify which value represents the sample mean and which value represents the claimed population mean. a) What is the sample mean? hours b) What is the claimed population mean? hours