TABLE III: Mean Deviation of Data from Values Predicted by the Regression Functions (2) and (5)
Classified According to Wind Direction:

Wind Direction	N	NE	E	SE	S	SW	W	NW
Number of Cases	15	12	1	1	2	14	4	6
Dev. from (2)	-0.3	-1.0	(-0.6)	(+4.1)	(-1.5)	0.0	+2.1	+0.9C
Dev. from (5)	+2.7	+2.0	(-4.0)	(+5.0)	(-2.5)	-2.4	-2.2	+1.3F
Note: Values in Parentheses are uncertain. (2) predicts the magnitude of the inversion, and (5) the fall of temperature to minimum.