[Solution] Suppose the average hourly charge for a population of lawyers is $140 and  = $25 and the charges are normally distributed: What is the probability


Question: Suppose the average hourly charge for a population of lawyers is $140 and  = $25 and the charges are normally distributed:

  1. What is the probability that a randomly chosen lawyer has an average hourly charge of more than $150?
  2. What is the proportion of lawyers that earn between $150 and $200?

C.      A sample of 36 lawyers is selected, what is the probability that the sample average is greater than $150? Explain why this answer is different from "A."

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