IV] 



Introduction 



XXI 











Calculated 



Index 



Observed 



.r/<r J 



(l + a) 



. Frequency 



69-5— 70-5 



1 



-3-9539 



99996 



Under 70-5 -1 



70-5— 71-5 



1 



-3-6625 



99988 



-2 



7 IS— 72-5 



— 



-3-3711 ' 



99963 



■6 



72-5—73-5 



2-5 



-3-0797 



99896 



1-5 



73-5—7J,-5 



1-5 



-2-7883 



99735 



3-3 



74-5— 75-5 



3-5 



-2-4969 



99374 



6-7 



75-5— 76-5 



12-5 



-2-2055 



98629 



12-7 



76-5—77-S 



17 



-1-9141 



97219 



22-1 



77-5~7S-5 



37 



- 1 -6228 



94768 



35-3 



78-5— 79-5 



55 



-1-.3314 



90846 



51-9 



79-5— 80-5 



71-5 



- 1 -0400 



85082 



70-1 



80-5— 81-5 



82 



- -7486 ' 



77294 



87-0 



81-5— 82-5 



116 



- -4572 1 



67623 



99-4 



82-5— 83-5 



98 



- -1658 



56584 



104-2 



83 -5—84 -5 



107 



-1256 



54997 



100-5 



84-5~85-5 



82 



•4170 



66165 



89-1 



8B-5—86-5 



74 



-7084 ' 



76064 



72-6 



86-5—87 -5 



58 



•9998 : 



84129 



54-3 



87-5— 88-5 



34-5 



1-2912 



90167 



37-4 



88-5— 89-5 



19 



1 -5825 



94324 



23-7 



89-5— 90-5 



10 



1 -8739 



96953 



13-8 



90-5— 91-5 



8 



2-1653 



98482 



7-4 



91-5— 92-5 



3 



2-4567 ' 



99299 



3-6 



92-5— 93-5 



1-5 



2-7481 



99700 



1-6 



93 ■5—9 4- 5 



2 



3-0395 



99882 



•7 



9 4-5—95 -5 



1-5 



3-3309 



99957 



-3 



95-5—96-5 



— 



3-6223 1 



99985 



Over 95-5 -1 



96-5—97-5 



— 



3-9137 



99995 



— 



97-5-98-5 



1 



4-2050 



99999 



— 



Totals ... 



900 



— 



— 



900-2 



Table IV (p. 11) 



Extension of the Table of the Probability Integral F—^{\ —a). (Calculated 

 by Julia Bell, M.A., Drapers Research Memoirs, Biometric Series, viii, p. 27.) 



It has been found needful occasionally to determine probabilities for deviations 

 exceeding considerably the limit xja = 6 of Sheppard's Table II. 



Illustration. If xja- = 34-31, determine to two significant figures the probability 

 of a deviation occurring as large or larger than this. 



The table gives us : 









33 



238-39135 



14-56180 





34 



252-95315 



14-99573 



•43393 



35 



267-94888 



15-42967 



•43394 



36 



283-37855 







