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[Solved] The average weekly earnings of bus drivers in a city are $950 (that is) with a standard deviation of $45 (that is). Assume that we select a random

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

  1. 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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