Question

You are planning a May camping trip to Denali National Park in Alaska and want to make sure your sleeping bag is warm enough. The average low temperature in the park for May follows a normal distribution with a mean of 32°F and a standard deviation of 8°F.

One sleeping bag you are considering advertises that it is good for temperatures down to 25°F. What is the probability that this bag will be warm enough on a randomly selected May night at the park?

Answer 1

µ = 32

sd = 8

                         

                          = P(Z > -0.88)

                          = 1 - P(Z < -0.88)

                          = 1 - 0.1894

                          = 0.8106 (ans)