Twelve units were placed on test. The test was terminated after
eight failures had been obtained (Type II censoring). In addition,
two units had to be removed prior to their failure or the
termination of the test. The following failure and censor times
were recorded 3, 50+ , 65, 157, 244, 245, 341, 382, 710+ , 950 Find
the MLE for the MTTF assuming the exponential distribution. Do this
problem manually without using software.