title:
  Data from page 166 in EQS program.
  Input based on Appendix 6.3 page 166, but is only
    for group 4 (the true longitudinal group).
  Figure 6.1 page 77, group 4 only.
  Output. 

    Table 6.4 (true longitudinal), page 81.
    NOTE. Correlation is standardized value of
      int with slope.

    Also Table 6.5 (true longitudinal column), computed
    based on intercept and slope values
data:  
  file = ch6tl.dat;
  format = free;
  type = means covariance;
  nobservations = 215;
variable:  
  names = y1 y2 y3 y4 y5; 
analysis:  
  type = general meanstructure;          
model:
  int slp | y1@0 y2@1 y3 y4 y5; ! y3 y4 y5 free to be estimated
output:
  tech1 standardized;