Final answer:
The Type I error is rejecting the null hypothesis when it is actually true. The Type II error is failing to reject the null hypothesis when it is actually false.
Step-by-step explanation:
In this case, the Type I error would be rejecting the null hypothesis that the sleeping bag can withstand temperatures of -15°F when in fact it can. The Type II error would be failing to reject the null hypothesis that the sleeping bag can withstand temperatures of -15°F when in fact it cannot.