Complete the following steps to interpret a stability study. Key output includes the regression equations, fitted values, confidence intervals, and prediction intervals.

Minitab displays the equations that it uses to calculate the predicted values (also called fits) for the response.

The confidence intervals are the range in which the estimated mean response for a given set of predictor values is expected to fall. The interval is defined by lower and upper limits, which are calculated from the confidence level and the standard error of the fits.

The prediction interval (PI) is the range in which the predicted response for a single observation with a given set of predictor values is expected to fall. The interval is defined by lower and upper limits, which are calculated from the confidence level and the standard error of the prediction. The prediction interval is always wider than the confidence interval because of the added uncertainty involved in predicting a single response versus the mean response.