Foot length: 25.0 cm; 99% confidence Finding a Prediction Interval. In Exercises 13–16, use the paired data consisting of foot lengths (cm) and heights (cm) of the 40 people listed in Data Set 2 of Appendix: Data Sets. Let x represent foot length and let y represent the corresponding height. Use the given foot length and the given confidence level to construct a prediction interval estimate of height. (Hint: Use the results in the top half of the display that accompanies Exercises 9–12. Also, x– = 25.68 cm, Σx = 1027.2 cm, and Σx2 = 26,530.92 cm2.)