Refer to Exercise 10.14

(p. 578). The researchers concluded that "in order to break a water-oil mixture with

' the lowest possible voltage, the volume fraction of the disperse phase x, should be high, while the sahnity x2 and the amount of surfactant x, should be low." Use this information and the first order model of Exerc~se 10.14 to find a 95% prediction interval for this "low" voltage y. Interpret the interval.