TABLE 2. CORRELATION COEFFICIENTS BETWEEN 

 SAMPLE jS'S, 50 PERCENT OF DATA MISSING 





Correlation Coefficients 



Variables 



Scripps Pier 



Triple Island 



J8i . 2 



0. 139 



0.187 



/Si. Pa 



-0. 151 



0.023 



0i . £ 4 



-0. 117 



-0.043 



/3 a . & 



0.111 



0. 061 



&, /3 4 



-0.148 



-0.075 



03. ^4 



-0. 155 



0.026 



The Monte Carlo technique has been applied to data 

 for the combinations of two stations, Scripps Pier and 

 Triple Island; for three lengths of series, 4, 7, and 12 

 years; and for fractions /of data missing in the range 0. 05 

 to 0.70. With respect to regression coefficients, figures 

 8A, 8B, and 8C display the results of these analyses in a 

 normalized form. The quantity plotted is the ratio Q of the 

 variances of the /3's attributable to missing data to the 

 variances of the jS's attributable to residual variability. 

 This ratio is the fractional increase in the variance of the 

 jS's attributable to missing data. Each point is based on 

 120 sample time series. 



24 



