| OCR Text |
Show I c o n s t r o o t Ing t h e 8ig* base normal line of the The mean called one two sigmae 20, M l below five the point two etgNM sigmas || Is from zero 200. the to 9.5, all the let one tenth of interval is pupil's table. and a fourteen which shows pupil on t h e base of Tl <-> l i n e tribution standards the of point roughly Belt of ho a per year table scores grade. ap. r t was is for was 1 the the she-, s , an five one the four the i t found ndard most is unit, table, read the for the the >ec l e a. r ; in so is a to sigma. that any twelve, from from the the one table of the distribution. fourteen, on the the of . go, the of point fifteen on J'tide I s o n g r de his nearly of and table rook, children a of position extended of used, convenient read frequency > stud;, tenths b. above deviations twentieths S . twenty, sigma eleven, thfct Likewise sigmae ten, OlA« those hundred nine, c h r o n o l o p i a.l raised units. used with in between groups arbitrarily page below age index : r-..n sigmae on three normal dealt four 160, sigma score Axeu-infin it eighty, a e r a u i a t 1, n s c a l e mean yean eigne was t he equ all i n f o r m a t i on s e c u r e d of a a were distribution of for fifteen line compositions of point way a p u p i l ' s In terms ages. the w* e t h e r or on Is called equal r*>nge manner: is distance bove the competitions called The pointi, ommon it on following below the slgmas ; ince .68 pupils' and 200. the below 4 0 , mean point; Bcale score, In t h i s no in a g e s was *ina thirteen, to rt.nge for basis three ho. . in £0 c o n v e n i e n t the : lpr.as zero year 140, , a distribution signa t lamas into above of one zero five alnce This below sigma .bove point make curve grouj three ivided one each the 60, wts t o frequency and then, from of hundred, two p o i n t i 180, score Table the dis five tenths grades re an score bove tie the are on mean |
