Question

Let us suppose that the durations of journeys* from Tallahassee to Miami can be modeled by a right-skewed distribution with mean 480 mins and standard deviation 40 mins. Use this information for the Journeys questions that follow. Let us consider a group of 36 journeys. What is the probability that their average duration turns out to be between 475 and 495 mins?

a. normalcdf(475, 495, 480, 40) = 0.196

b. normalcdf(475, 495, 480, 240) = 0.033

c. normalcdf(475, 495, 480, 6.67) = 0.761

d. normalcdf(475, 495, 480, 1.11) = 0.999

Answer 1

Use TI-84 series calculator