Based on the data collected from 23 flights, what is the probability of at least one O-ring failing, regardless of temperature? (Note: This probability is called an experimental probability because it's based on only 23 flights, which is a fairly small number of events. To get a
better approximation of the actual probability, we would need data from many more flights. Note also that even though there was O-ring failure
on seven flights, all of those shuttles returned safely.)