The SAS System        22:14 Thursday, August 25, 2011   1

                                        The TTEST Procedure

                                          Variable:  ratio

                    N        Mean     Std Dev     Std Err     Minimum     Maximum

                   41      9.2576      1.2036      0.1880      6.2300     12.0000

                       Mean       95% CL Mean        Std Dev      95% CL Std Dev

                     9.2576      8.8777   9.6375      1.2036      0.9881   1.5400

                                       DF    t Value    Pr > |t|

                                       40       4.03      0.0002