Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.12095 -0.01682 -0.01123  0.00592  0.41517 

Coefficients:
              Estimate Std. Error t value Pr(>|t|)  
(Intercept)  0.0844042  0.0363644   2.321   0.0206 *
xca         -0.0763741  0.0419900  -1.819   0.0694 .
xcs         -0.0667010  0.0398352  -1.674   0.0945 .
xda         -0.0781014  0.0419900  -1.860   0.0633 .
xde         -0.0678372  0.0368802  -1.839   0.0663 .
xel         -0.0492117  0.0385703  -1.276   0.2024  
xen         -0.0675708  0.0364117  -1.856   0.0639 .
xes         -0.0699243  0.0365659  -1.912   0.0563 .
xet          0.0004309  0.0419900   0.010   0.9918  
xfa         -0.0698835  0.0445371  -1.569   0.1171  
xfi         -0.0735225  0.0445371  -1.651   0.0992 .
xfr         -0.0665319  0.0366519  -1.815   0.0699 .
xhr          0.0365432  0.0419900   0.870   0.3845  
xhu         -0.0784245  0.0406566  -1.929   0.0542 .
xis         -0.0275242  0.0406566  -0.677   0.4986  
xit         -0.0811585  0.0419900  -1.933   0.0537 .
xiw         -0.0843636  0.0445371  -1.894   0.0586 .
xja         -0.0843823  0.0445371  -1.895   0.0586 .
xka         -0.0499488  0.0398352  -1.254   0.2103  
xko         -0.0609126  0.0383315  -1.589   0.1125  
xky         -0.0593246  0.0514270  -1.154   0.2491  
xlt         -0.0370300  0.0406566  -0.911   0.3627  
xlv         -0.0366385  0.0406566  -0.901   0.3678  
xmng        -0.0727064  0.0514270  -1.414   0.1579  
xnl         -0.0793562  0.0398352  -1.992   0.0468 *
xno         -0.0443340  0.0388752  -1.140   0.2545  
xpl         -0.0706952  0.0445371  -1.587   0.1129  
xpt         -0.0608622  0.0372202  -1.635   0.1025  
xro         -0.0679922  0.0406566  -1.672   0.0949 .
xru         -0.0751351  0.0383315  -1.960   0.0504 .
xsk         -0.0789992  0.0419900  -1.881   0.0604 .
xsl         -0.0371802  0.0406566  -0.914   0.3608  
xsq         -0.0369665  0.0514270  -0.719   0.4725  
xsr         -0.0245466  0.0445371  -0.551   0.5817  
xsv         -0.0678365  0.0392781  -1.727   0.0846 .
xth         -0.0084606  0.0419900  -0.201   0.8404  
xvi         -0.0731191  0.0445371  -1.642   0.1011  
xzh         -0.0653312  0.0445371  -1.467   0.1429  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03636 on 674 degrees of freedom
Multiple R-squared:  0.09661,	Adjusted R-squared:  0.04702 
F-statistic: 1.948 on 37 and 674 DF,  p-value: 0.0007926