Free PMI Project Management Professional (PMP) Practice Question

The correct answer is 4 days². The formula for calculating variance in three-point estimation is Variance = ((Pessimistic - Optimistic) / 6)². In this case, we have:

Variance = ((22 - 10) / 6)² Variance = (12 / 6)² Variance = 2² Variance = 4

It's important to note that variance is expressed in squared units (days² in this case) and represents the spread of possible outcomes around the mean. A higher variance indicates greater uncertainty in the activity duration. Understanding how to calculate variance helps project managers quantify risks and make informed decisions about contingency planning and resource allocation.