I hope this is the right place where to formulate this question. In a basic course in statistics we learn how to calculate the mean life time of an electronic device. Home appliances are electronic device of course, but all that we know when we buy one is the time length of warranty.
What is the relation of mean life time and warranty time in the home appliances? or better how is calculated the warranty time? What I am interested is how to calculate the probability that an appliance will brake within the warranty time.