Answer
We are 95% confident that the height of someone with a foot length of 29 cms is between 177.896cm and 200.247cm.
Work Step by Step
We can get the interval by the output under Predicted Values for New Observations, hence it is 177.896 to 200.247. Hence we are 95% confident that the height of someone with a foot length of 29 cms is between 177.896cm and 200.247cm.