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6. Suppose that speeds of vehicles on a particular stretch of roadway have mean 36.6 mph...

6. Suppose that speeds of vehicles on a particular stretch of roadway have mean 36.6 mph and standard deviation 1.7 mph. Find the probability that mean speed of 36 randomly selected vehicles is between 35 and 40.

Math   Statistics-And-Probability   
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Answer #1

6

This is a normal distribution question with


P(35.0 < x < 40.0)=?

This implies that


PS: you have to refer z score table to find the final probabilities.
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