
 Term          Contrast Estimate Std. Error     z Pr(>|z|)  40.0 %  60.0 %
  cyl mean(6) - mean(4)   -5.968     1.6393 -3.64   <0.001 -6.3830 -5.5523
  cyl mean(8) - mean(4)   -8.521     2.3261 -3.66   <0.001 -9.1102 -7.9315
  hp  mean(dY/dX)         -0.024     0.0154 -1.56    0.119 -0.0279 -0.0201

Columns: term, contrast, estimate, std.error, statistic, p.value, conf.low, conf.high 
Type:  response 

