Sieve No. 230 Page 4 



a 



b 



c 



S.F. 



13 



10 



10.05 



0.88 



16 



12 



10.05 



0.72 



15 



10 



10.05 



0.82 



12 



12 



7.95 



0.66 



15 



15 



9.00 



0.60 



22 



11 



7.95 



0.50 



14 



12 



7.95 



0.61 



15 



10 



5.86 



0.48 



18 



13 



9.00 



0.58 



19 



12 



7.95 



0.52 



19 



12 



7.95 



0.52 



14 



14 



7.95 



0.56 



19 



14 



7.95 



0.48 



12 



11 



7.32 



0.63 



21 



13 



10.05 



0.60 



18 



13 



10.05 



0.65 



18 



11 



7.95 



0.56 



18 



10 



9.00 



0.67 



£ x.= 63.32 



X = 0.63 



1L.X 2 = 41.73 



(£.x) 2 /n = 40.09 



n = 100 



s 2 



= 0.016 



s 



= 0.127 



Sx 



= 0.0127 



31 



