1.

Suppose that vehicle speeds at an interstate location have a normal distribution with a mean equal to 70 mph and variance equal to 36 mph. What is the z-score for a speed of 65 mph? If a normal distribution has a mean of 35 and a standard deviation of 10, then which of those pairs denotes the median and the mode? 0 (median: 45, mode: 35) O (median: 35, mode: 45) O (median: 45, mode: 45) O (median: 35, mode: 35) The flight duration between Montreal and Toronto is observed to be normally distributed with a mean 75 and standard deviation of 15 minutes. Which of the following gives the probability that the next flight will arrive within 60 minutes? Opnorm(75, 15, 60) Opnorm(60, 75, 15) O dnorm(60, 75, 15) O dnorm(75, 15, 60)