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If the salary of Walmart technicians in the United States is normally distributed with the mean of $45,200 and the standard deviation of $4,300, find

If the salary of Walmart technicians in the United States is normally distributed with the mean of $45,200 and the standard deviation of $4,300, find the probability for a randomly selected technician to earn

  1. No less than $47,000.
  2. What is the probability that the mean salary of a random sample of 12 technicians is at most $45,000?

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