Question

sample response: a model is an estimate or approximation of a data set. in the real world, there are too many variables to know exactly what will happen. however, if a model is a good fit, then it can be used to make predictions about what will happen. with a useful model, a predicted value should be a good estimate of an observed value. what did you include in your response? check all that apply. a model is an estimate of a data set. a useful model can be used to make predictions. predictions should be a good estimate of what will actually happen.

Explanation:

The sample response states that a model is an estimate of a data - set, a useful model can be used for predictions, and predictions should be a good estimate of what will actually happen. These points are reflected in the given options.

Answer:

A. A model is an estimate of a data set.
B. A useful model can be used to make predictions.
C. Predictions should be a good estimate of what will actually happen.