<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["en", "en"].<end_of_turn>
<start_of_turn>user
Explain the concepts of Variance and Standard Deviation in project estimation.<end_of_turn>
<start_of_turn>model
Variance and Standard Deviation measure how spread a population is from the average. Standard Deviation is the square root of Variance. In PERT, the standard deviation is one-sixth of the range.<end_of_turn><eos>