A major company in the Montreal region, offering a range of engineering services ranging from the preparation to the execution of construction projects, and project management in an industrial environment, wants to ensure that the people who are assigned to the Project Cost Estimating and Bid Preparation have some consistency in their estimates. The head of civil works and municipal services decided to structure an experiment plan to detect if there could be significant differences in the evaluation of the projects. Six projects were selected, each of the projects having to be evaluated by each of the 2 estimators, the order of the projects submitted being random. The estimates obtained are presented in the table below.