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Chapter 5: Normal Probability Distributions - Solutions
For the probability that a<X<b(Xis between two numbers, aand b), convert a and binto z-scores using z= a ˙ and z= b ˙ and use the table to nd the area between the two z-values. 1.The average speed of vehicles traveling on a stretch of highway is 67 miles per hour with a standard deviation of 3:5 miles per hour. A vehicle is selected at random.
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