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(See Solution) The average weekly earnings of bus drivers in a city are $950 with a standard deviation of $45. Assume that we select a random sample of 81

Question: The average weekly earnings of bus drivers in a city are $950 with a standard deviation of $45. Assume that we select a random sample of 81 bus drivers

  1. Assume the number of bus drivers in the city is large compared to the sample size. Compute the standard error of the mean
  2. What is the probability that the sample mean will be greater than $960
  3. If the population of bus drivers consisted of 400 drivers, what would be the standard error of the mean?

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