A report states that the cost of repairing a hybrid vehicle is falling even while typical repairs on conventional vehicles are getting more expensive. The most common hybrid repair, replacing the hybrid inverter assembly, had a mean repair cost of $3,927 in 2012. Industry experts suspect that the cost will continue to decrease given the increase in the number of technicians who have gained expertise on fixing gas-electric engines in recent months. Suppose a sample of 100 hybrid inverter assembly repairs completed in the last month was selected. The sample mean repair cost was $3,860 with the sample standard deviation of $500. Complete parts (a) and (b) below. Find the test statistic for this hypothesis test. STAT = (Round to two decimal places as needed.) The critical value(s) for the test statistic is(are) (Round in twin dorimal nlarae se noorlad I les a ramma to conarato aneware ac noorlot ) Click to select your answer(s)