FRIEDMAN version 1.24 (Jan 17, 2002) http://ff123.net/
Tukey HSD analysis

Number of listeners: 12
Critical significance:  0.05
Tukey's HSD:   0.749

Means:

LAME_130 3gpp_v1  Nero_v1  CT_v1    Nero_v2  CT_v2    iTunes_L 
  5.00     3.38     3.38     3.14     2.89     2.89     1.62   

-------------------------- Difference Matrix --------------------------

         3gpp_v1  Nero_v1  CT_v1    Nero_v2  CT_v2    iTunes_L 
LAME_130   1.617*   1.625*   1.858*   2.108*   2.108*   3.383* 
3gpp_v1             0.008    0.242    0.492    0.492    1.767* 
Nero_v1                      0.233    0.483    0.483    1.758* 
CT_v1                                 0.250    0.250    1.525* 
Nero_v2                                        0.000    1.275* 
CT_v2                                                   1.275* 
-----------------------------------------------------------------------

LAME_130 is better than 3gpp_v1, Nero_v1, CT_v1, Nero_v2, CT_v2, iTunes_LC
3gpp_v1 is better than iTunes_LC
Nero_v1 is better than iTunes_LC
CT_v1 is better than iTunes_LC
Nero_v2 is better than iTunes_LC
CT_v2 is better than iTunes_LC