Research question: Is the population mean greater than 15? H 0 : = 15 H a : > 15 In a large sample, a mean of 16.7 was observed. A standard error of 0.5 was computed. Compute the test statistic using the formula from the online notes: t e s t s t a t i s t i c = s a m p l e s t a t i s t i c n u l l p a r a m e t e r s t a n d a r d e r r o r Round your final answer to three decimal places