Fig. 1
(A) Coverage of 95% confidence intervals for the angle to the intake target (IT) as estimated by a homoscedastic linear model (LM), heteroskedastic LM, and heteroskedastic LM where the IT is known with infinite precision, as a function of the ratio of nutrients in experimental foods, as found by simulation. The black line the nominal rate for coverage. (B) Standard error for the angle to the IT as a function of the ratio of experimental foods as found by simulation and the delta method10. In (A and B) the red line indicates the ratio of the IT. (C) Data from D. melanogaster showing the standard deviation in total nutrient intake, the angle to the experimentally estimated protein to carbohydrate (PC) ratio of the IT (1:4), and a superficially imposed IT (1:1).
