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The average speed of a random vehicle on a specific stretch is assumed to be normally distributed with an expectation of 84 km / h
The average speed of a random vehicle on a specific stretch is assumed to be normally distributed with an expectation of 84 km / h and a standard deviation of 11 km / h. We assume independence between the vehicles.
a)
Calculate the probability that a random vehicle has an average speed lower than 101.60 km / h.
b)
Calculate the probability that a random vehicle has an average speed higher than 75.97 km / h.
c)
We examine the average speed of 100 cars. Calculate the probability that the average speed of these cars will be over 83.67 km / h.
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