mass	meff	distance	x2	xy	y2	(y-y')2
50	109.0	1.000	11887.541	109.030	1.000000	30.250000
60	119.0	2.100	14168.141	249.963	4.410000	19.360000
70	129.0	3.100	16648.741	399.993	9.610000	11.560000
80	139.0	4.150	19329.341	576.975	17.222500	5.522500
100	159.0	6.000	25290.541	954.180	36.000000	0.250000
120	179.0	8.000	32051.741	1432.240	64.000000	2.250000
140	199.0	10.000	39612.941	1990.300	100.000000	12.250000
150	209.0	11.000	43693.541	2299.330	121.000000	20.250000
170	229.0	13.150	52454.741	3011.745	172.922500	44.222500
			0.000	0.000	0.000000
			0.000	0.000	0.000000
sums	1471.3	58.5	255137.27	11023.755	526.165	145.915
SS			14622.222	1460.5	145.915
	n =	9	0.037	= SSE
	mean =	6.500	0.0053	= s2
	t =	1.415	0.073	= s
	slope =	0.100	0.001	= ± interval
	mspr=	177.090