HYPOTHESIS TESTING 1.) One of the undersecretaries of the Department of Labor and Employment (DOLE) claims that the average civil engineer is earning more than Php 18,000 monthly. A sample of 19 civil engineer's salary has a mean of Php 17,350 and a standard deviation of Php 1,230. Is there enough evidence to reject the undersecretary's claim at a = 0.01? Please follow the proper 5-step format for your solution.