Suppose that the speed at which cars go on the freeway is normally distributed with mean 66 mph and standard deviation 7 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( b. If one car is randomly chosen, find the probability that it is traveling more than 63 mph. c. If one of the cars is randomly chosen, find the probability that it is traveling between 69 and 75 mph. d. 61% of all cars travel at least how fast on the freeway? mph.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.