EXAMPLE 11.6 | Oxygen Purity Prediction Interval 102 To illustrate the construction of a prediction interval, suppose that we use the data in Example 11.1 and find a 95% predic 99 tion interval on the next observation of oxygen purity at to = 1.00%. Using Equation 11.33 and recalling from Example 11.5 that yo = 89.23, we find that the prediction interval is 96 Oxygen purity y (7%) 89.23 - 2.101 1.18 1+ . 1 (1.00 - 1.1960)3 20 93 0.68088 SY