Table 1 . -- Calculation of sample mean and variance estimates (N-IO , n=5) 



Unit P. Y. Y./P. 



3 0.27596 56. 202.924 



6 .31157 62. 198.990 



9 .34125 60. 175.825 



Sums .9287834 178. 577.74128 



Means .309593 59.3333 192.581 



Sum of Squares 0.2896829 10580.00 111690.465 



Y = I Y./P. - 577.7 



t ^ 



I (P.)2 - (Z P.)2/n = 0.2896829 - (0.9287834)2 / 3 ^ .0021367334 



E - Z (^^/-P^) ^ ^^/" = 178. - (577.74128) (0.9287834)/ 3 = -0.8655035 



I {Y./P.)^ - (Z Y./P.)^/n = 111690.465 - (577.74128)2/ 3 ^ 428.80126 



b = -.8655035 / .00213673 = -405.059 



52 = [428.80126 - (-405.059)2 (.00213673)] / (3-2) = 78.22111 

 Z?2 - Var b = 164072.7935 - 78.2211 / .0021367334 = 127464.9976 

 TS = .000385958 

 TP = 0.85164 



Var y = 9 (127464.9976) (.000385958) + 3 (0.85164) (78.22111) 

 = 442.765 + 199.849 = 642.614 



10 



