Q3) An engineer testing the tensile strength of wires states that tensile strength of wires should be at least 300 000 psi for safety. A control engineer does the tests with 26 wires and found a mean ultimate tensile strength of 297 700 psi and a standard deviation of 10 000 pa from the test results. a) Is there enough evidence that wire does not have tensile strength suitable for safety at the 10% significance level? Show the rejection region and specific point in the distribution. (10 pts) b) What is the smallest level of significance at which you would be wiling to reject the null hypothesis? (10 pts)