±3 sigma precision Question - Need help

Submitted by NSB on Tue, 03/01/2016 - 15:15

A project manager made 3-point estimates on a critical path and found the following results:

Assuming ±3 sigma precision level for each estimate, what is the standard deviation of the allover path?

 
  App. 4.2 days
  App. 5.2 days
  App. 6.2 days
  You can not derive the path standard deviation from the information given.

 

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admin

Tue, 03/08/2016 - 03:42

This is an FAQ , check this http://pmzilla.com/3-point-estimates