I would like to know how can you describe it. 

1. Lengths of hospital stays at a New York hospital are known to follow a rightskewed distribution with mean 7.54 days and standard deviation 5.08 days. (a) Suppose you take a sample of 19 patients. What is the probability that the sample mean length of stay for this group is less than 7.00 days? If you cannot calculate this probability, state so and state why. [2 marks] (b) Suppose you take a sample of 100 patients. What is the probability that the total length of stay for this group is less than 760 days? If you cannot calculate this probability, state so and state why. [2 marks] (c) For each of the probabilities calculated above, state which are approximate, and which are exact, and state why. [2 marks]