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4.21. The salary of 1,000 engineers at Ford was normally distributed with mean salary $67,000 and standard deviation $7,600. a. 35% of engineers at Ford

4.21. The salary of 1,000 engineers at Ford was normally distributed with mean salary $67,000 and standard deviation $7,600. a. 35% of engineers at Ford make at least how much? b. What is the probability that an engineer makes less than $50,000? 0. What is the probability that an engineer makes $60,000 to $70,000

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