[Solution] The time it takes for a school system to complete major building repair projects is assumed to be normally distributed with a population mean


Question: The time it takes for a school system to complete major building repair projects is assumed to be normally distributed with a population mean value of MU = 32 days and a population standard deviation value of SIGMA = 7 days.

  1. What proportion of projects will be completed in less than 29 days?
  2. What proportion of projects will be completed in more than 43 days?
  3. What proportion of projects will be completed between 22 and 40 days?
  4. What proportion of projects will be completed between 24 and 32 days?

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