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Part 1: Explain how z-scores can be used to determine the probability of getting a certain z-score? Part 2: (Please explain on paper so I

Part 1:

Explain how z-scores can be used to determine the probability of getting a certain z-score?

Part 2:

(Please explain on paper so I can better understand it!)

The average speed on a certain highway is = 58 with a standard deviation of = 10. What portion of cars is traveling between 55 and 65 mph?

Part 3:

Come up with a z-score and proportion problem

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