Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with mean 36.6 mph and standard d

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answerhappygod
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Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with mean 36.6 mph and standard d

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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.
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