GLM blues blugrass jazz BY agecat4 race
 /METHOD = SSTYPE(3)
 /INTERCEPT = INCLUDE
 /POSTHOC = agecat4 race ( TUKEY BONFERRONI )
 /PLOT = PROFILE( agecat4 )
 /PRINT = DESCRIPTIVE ETASQ PARAMETER HOMOGENEITY RSSCP TEST(SSCP)
 /PLOT = SPREADLEVEL RESIDUALS
 /CRITERIA = ALPHA(.05)
 /DESIGN .