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Math · Statistics And Probability
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U 1 year before buying a new one. users will keep their phone for less than Because 2.28% is less than 5%, this is an unusual event. Try It Yourself 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. What is the probability that it is violating the speed limit of 70 miles per hour? Assume the speeds are normally distributed and are represented by the variable r a. Sketch a graph. b. Find the z-score that corresponds to 70 miles per hour. c. Find the area to the right of that z-score. d. Interpret the results. Can someone please show me the steps to this problem please?
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