I Approximating a prediction Interval for an Individualy value a reasonable estimate for interval bounds on an individual y value given various x values is generated by t where i= the estimated value of y based on the set of x values provided t=critical t value, (1-0)% confidence df=n-k s,= the multiple standard error of the estimate o 2002 The Wadsworth GroupApproximating a Prediction Interval for an Individual y Value • A reasonable estimate for interval bounds on an individual y value given various x values is generated by: where = the estimated value of y based on the set of x values provided t = critical t value, (1–a)% confidence, df = n – k – 1 se = the multiple standard error of the estimate y ˆ ±t×s e y ? © 2002 The Wadsworth Group