I am unfortunately distracted by the large number of significant digits. House 1 burned 2.785kg @ 0.038150685 kg&#x2F;min, which implies a precision of micrograms per minute,<p>Using decimal math, that works out to exactly 72.99999986894075427479218263 minutes. Realistically, it&#x27;s 73 minutes. There are only 2 significant digits so the reported rate should be 0.038 kg&#x2F;minutes.<p>Also, there&#x27;s is a factor of 3 variation in wood&#x2F;meal unit, compared to 25% improvement in switching stoves. Why aren&#x27;t all of the houses using the efficient cooking technique of house 3? For that matter, how reproducible are the numbers for each house?<p>Finally, I see that house 2 had no gains, using about the same wood&#x2F;meal unit with all three stoves. Does this mean that about 1&#x2F;3rd of the users of the stove will see no gain to switching? Or does it mean that there isn&#x27;t enough data to draw a good statistical conclusion? What are the odds of seeing these results purely from random chance?