According to a study, the salaries of registered nurses are normally distributed with a mean of 55140 dollars and a standard deviation of 6563 dollars. Let X be the salary of a randomly selected registered nurse.1. Describe the probability distribution of X and state its parameters and : X ~ Select an answer N B Z F T ( = , = )2. Find the probability that the salary of a randomly selected registered nurse is

1. less than 43853 dollars. (Round the answer to 4 decimal places)
2. between 49838 and 70360 dollars. (Round the answer to 4 decimal places)
3. more than 73745 dollars. (Round the answer to 4 decimal places)

3. Find the 50-th percentile for the salaries of registered nurses. dollars (Round the answer to 1 decimal