A PERT Project Has 45 Activities, 19 of Which Are

question 99

Multiple Choice

A PERT project has 45 activities, 19 of which are on the critical path. The estimated time for the critical path is 120 days. The sum of all activity variances is 64, while the sum of variances along the critical path is 36. What is the probability that the project can be completed between days 114 and 120?

• A) 0.84134
• B) 0.22663
• C) 0.34134
• D) 0.47725
• E) 0.27337

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Definitions:

Population Proportion

The fraction or percentage of a population that exhibits a particular characteristic or attribute.

Marginal Error

The amount of error allowed in the results of a survey or experiment, affecting how the results can be interpreted; commonly associated with the term "margin of error."

Confidence

A degree of certainty or belief in a proposition, often quantified in statistics as a confidence level in interval estimates.

Sample Size

The number of individuals or observations included in a sample drawn from a population.