. The ecology and life history of the common frog (Rana temporaria temporaria) . 40 50 6O OBSERVED DATE 70 80 90 Fig. 40, An Informal Test of the Regression Equation Ten records were taken at random, and the corresponding variables substituted in the equation to give a calculated date. This has been plotted against the actual date. The agreement is good, only one point being far wrong. mm, TM2 = Temperature in M2, in °C, LT = "Latitude, LG = "Longitude. Thenâ Y = 57-5 + (0-003 5) AP â (0-0031) AM + (o-02)RMo + (o-9i)TMo â (o-0707)RMi + (o-i7)TMi + (o-03o)SMi + (o-oo9)RM2 + (3-io)LT-
. The ecology and life history of the common frog (Rana temporaria temporaria) . 40 50 6O OBSERVED DATE 70 80 90 Fig. 40, An Informal Test of the Regression Equation Ten records were taken at random, and the corresponding variables substituted in the equation to give a calculated date. This has been plotted against the actual date. The agreement is good, only one point being far wrong. mm, TM2 = Temperature in M2, in °C, LT = "Latitude, LG = "Longitude. Thenâ Y = 57-5 + (0-003 5) AP â (0-0031) AM + (o-02)RMo + (o-9i)TMo â (o-0707)RMi + (o-i7)TMi + (o-03o)SMi + (o-oo9)RM2 + (3-io)LT-(3-4)LG Fig. 40 is an informal illustration of the way in which it fits the facts. Ten dates were chosen at random and the values substituted in the equation, so as to obtain a date by calculation. The actual dates were then plotted against the calculated dates. It can be seen that only one date is much out of line. In the other cases, if the pond had been visited on the calculated date frogs might have been there, just departed or
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectranatemporaria
