## Viewing a prediction interval

A prediction interval is a range of values associated with a prediction and
a confidence level (for example, 95%). For a given set of prediction
assumptions, future observations can be expected to fall within the interval a
specified percent of the time. For example, if the prediction interval is
10-20, and the confidence level is 95%, you can expect 95% of observations to
fall between 10 and 20, and 5% of observations to fall outside that range. The
prediction interval takes into account both randomness in the model and
uncertainty in the parameter estimates. Prediction intervals are often more
useful than a single predicted value because they reflect the uncertainty
inherent in predictive modeling.

To view a prediction interval:

- In the Predict view, select
*Prediction interval* from the
button labeled *Display* at the bottom of the window
- Set the slider to the desired confidence level

The prediction interval will then appear in place of the predicted value.

See also:

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