D Question 1 10 pts The AMA (American Marketing Association) regularly conducts a salary survey of its membership for various marketing roles. Based on the most recently published mean and standard deviation, a business development manager at a startup company calculated the z-score associated with his salary and found it was -2.50. His finding tells him that his salary: O is 2.5 standard deviations below the average salary O much higher than the average salary 2 and a half times more than the average salary is 2.5 standard deviations above the average salary O 2 and a half times less than the average salary