The question in part ii asks for the estimate for the non-qualification function... This means that the event of interest should be the days left without qualification. However, the solution has been provided for the event as days qualified. Kindly explain Thanks and regards, Pratik
We are tracking for the time required to qualify, hence that is our decrement. https://www.acted.co.uk/forums/index.php?threads/september-2015-q7.13972/ This might help in understanding decrement in a much better way
