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The process of dividing a data set into a training, a validation, and an optimal test data set iscalled _____________.
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- The independent variable is also called the __________ variable.
- Select all that applyWhich of the following is true of qualitative forecast methods? Select all that apply!Multiple select question.Useful to forecast variables, such as product sales and product defectsUseful when historical numerical data is availableUsed when future results are suspected to depart markedly from results in prior periodsAttractive when historical data are not available
- A __________ is used to visualize sample data graphically and to draw preliminary conclusions about the possible relationship between the variables. a. contingency table b. scatter chart c. Gantt chart d. pie chart