STP 231 Lecture 27: In Depth Example

• School: ASU
• Department: Statistics and Probability
• Course: STP 231
• Professor: Jackiewicz

Document Summary

X = 15 is outside the range of data. The value of yhat assumes that there will be a continuation of the trend x = 15 is such a high number that it gives a number value which just doesn"t make sense for the data. This would be a perfect example of extrapolation: some data shows the average. In general data which uses the average of the data will have a stronger trend than the actual data. Look out for this because it can lead to incorrect observations about the data o yhat= o+ 1 x+ b1=. 018 o: 95% ci for 1 b1 t . 025 seb1.