help checking this answer please

Question 3 - of 6 Step 2 of 6 01:05:39 An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 280 engines and the mean pressure was 6.5 pounds/square inch (psi). Assume the population variance is 0.64. If the valve was designed to produce a mean pressure of 6.6 p. is there sufficient evidence at the 0.02 level that the valve does not perform to the specifications? Step 2 of 6: Find the value of the test statistic. Round your answer to two decimal places. Answer(How to Enter) Answered 2 Points Tables Keypad Keyboard Shortcuts -2.09 Next OL X @ 2020 Hawkes Learning