A student examining has the obtained the relationship follow

A student examining has the obtained the relationship following computer output from between BTU input to a furnace a regression and the BTU Output. S = 0.5580 R -Sq = 96.3% From this we conclude for every BTU Input to a furnace, the output Increases by 0.9 11, on average. for every 0.911 BTU input to a furnace, the output increases by 1, On average. for every 0.187 BTU input to a furnace, the output Increases by 0.911, on average.

Solution

I just took this on a quiz and the correct answer is the first one, according to my graded quiz.

I don\'t know statistics well, but it does make sense to me physics-wise that you can\'t get more energy (BTU) out of a furnace (or anything) than what you put in. The only answer that indicates the furnace is (realistically) less than 100% efficient is the first one.