1 We wish to test the hypothesis that data is being generated by the exponential process Exp () . 12 Given the datum value 15.2804 , we accept that it is generated by the process if it is in a 90% one- sided to the left interval for the process. Thus we accept the hypothesis if the datum is at most Since 15.2804 is v" 0' intheinterval, we reject v x 0' the hypothesis