Listed below are altitudes (thousands of feet) and outside air temperatures (°f) recorded during a flight. find the (a) explained variation, (b) unexplained variation, and (c) indicated prediction interval. there is sufficient evidence to support a claim of a linear correlation, so it is reasonable to use the regression equation when making predictions. for the prediction interval, use a 95% confidence level with the altitude of 6327 ft (or 6.327 thousand feet).