Q2: Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with mean 36.6 mph and standa
Posted: Sun Sep 05, 2021 5:22 pm
Q2: Suppose speeds of vehicles on a particular stretch of
roadway are normally distributed with
mean 36.6 mph and standard deviation 1.7 mph. (10 marks)
a. Find the probability that the speed X of a randomly selected
vehicle is
between 35 and 40 mph.
b. Find the probability that the mean speed X ̄ of 20 randomly
selected vehicles is
between 35 and 40 mph.
roadway are normally distributed with
mean 36.6 mph and standard deviation 1.7 mph. (10 marks)
a. Find the probability that the speed X of a randomly selected
vehicle is
between 35 and 40 mph.
b. Find the probability that the mean speed X ̄ of 20 randomly
selected vehicles is
between 35 and 40 mph.