The year Linda graduated college, the starting salaries of all entry-level software engineers in the United States had a mean of $65,000 and a standard deviation of $3700. That year, Linda got a job as an entry-level software engineer working for a firm in the United States. Her starting salary was $57,000. What is the z-score for Linda's starting salary?
1) -2.16
2) -1.62
3) -0.81
4) 0.81