4. using a 0.05 significance level, perform a hypothesis test to determine if the process appears to still be on target. you may use jmp to calculate the test statistic and the p-value for the test. to do this, again click on the red triangle next to lead diam and select test mean. in the window that pops up, enter the hypothesized mean from your null hypothesis. since we are given the standard deviation in the original statement of the problem, enter that value as the true standard deviation so that the z-test is performed.