SEA-FISHERIES LABORATORY. 



183 



Measurements of 200 Plaice hatched at Port Erin on 26 April, 

 1906, and examined on 27 May, 1907. 



Limits 





Actual 









of 



Distance from 



Nos. 



X 1 





f(x) xN 



Length 



mode in 



between 



— . 



m 



(calcu- 



in 



inches. 



limits. 



c 





lated 



inches. 



x> 



/ 







Nos.) 



1J to 11 



-1-375 to 1-125 



2 



-1-72 



0-493) . 017 



312 



H „ if 



-1-125 „ 0-875 



1 



-1-4 



0-476 j 



! 0-038 



6-9 



If „ 2 



-1-875 „ 0-625 



20 



-1-09 



0-438 



0-076 



13-9 



2 „ 21 



-0-625 „ 0-375 



26 



-0-77 



0-362 



0-115 



21-16 



2i „ 2| 



-0-375 „ 0-125 



29 



-0-47 



0-247 



0-157 

 0-090 



28-8 



















( -0-16 





2i „ 2| 



-0-125 ,,+0-125 



37 



0-180 



33-1 









(+0-16 



0-090 ' 



1 0-157 





2| „ 3 



+ 0-125 „ 0-375 



25 



+0-47 



0-247 



0-115 



28-8 



3 „ H 



+ 0-375 „ 0-625 



24 



+ 0-77 



0-362 1 



0-076 

 0-438 



0-038 

 0-476 



0-017 

 0-493 ] 



21-16 



H „ H 



+0-625 „ 0-875 



12 



+ 1-09 



13-9 













H n 3! 



+ 0-875 „ 1-125 



4 



+ 1-4 



6-9 













3| „ 4 



+ 1-125 „ 1-375 



4 



+ 1-72 



3-12 



4 „ 4J 







8 















N = 184 (the part 



of the series 



4i ,. 4* 



— 



5 



above 3J to 4 bein 



g neglected) . 



4J „ 4| 



— 



1 



Stand; 



<T - 



ird deviation 



= 



4f „ 5 

 5 „ 5£ 



V N 



= 0-505. 



5£ „ 5£ 



— 



1 



Modulus = c = aA 



la- = 0-712. 



5^ „ 5| 



— 



1 



Mode is at 2*625 in 



ches. 



. i r* 



f (x) is -i-3 I 



V IT J O 



e — x' 2 . dx, the equation for the integral 



curve of error. Values are tabulated in Bowley's Elements 

 of Statistics, ed. 2, 1902, p. 281. 



/ (x) x N are the nos. of fish on the algebraic curve 

 occurring between the limits in Column I. 



