Answer:
True.
Step-by-step explanation:
In cost estimation, the total cost of a project is typically calculated as the sum of the estimated costs for individual tasks or components of the project. Since the actual cost of each task may vary due to various factors such as changes in material prices, unexpected challenges, or variations in the level of effort required, each component cost is often considered as a random variable with a probability distribution. This helps to account for uncertainty and risk in the cost estimation process.