Tirewear Example    16:16 Thursday, September 15, 2011   1
                   Check relationship between tire pressure and lifetime mileage

                                     Obs    pressure    mileage

                                       1       30         29.5
                                       2       30         30.2
                                       3       31         32.1
                                       4       31         34.5
                                       5       32         36.3
                                       6       32         35.0
                                       7       33         38.2
                                       8       33         37.6
                                       9       34         37.7
                                      10       34         36.1
                                      11       35         33.6
                                      12       35         34.2
                                      13       36         26.8
                                      14       36         27.4

                                          Tirewear Example    16:16 Thursday, September 15, 2011   2
                   Check relationship between tire pressure and lifetime mileage

                                         The CORR Procedure

                                  2  Variables:    pressure mileage


                                     Covariance Matrix, DF = 13

                                              pressure           mileage

                            pressure        4.30769231       -0.89230769
                            mileage        -0.89230769       14.29516484


                                         Simple Statistics

     Variable           N          Mean       Std Dev           Sum       Minimum       Maximum

     pressure          14      33.00000       2.07550     462.00000      30.00000      36.00000
     mileage           14      33.51429       3.78089     469.20000      26.80000      38.20000


                              Pearson Correlation Coefficients, N = 14
                                     Prob > |r| under H0: Rho=0

                                              pressure       mileage

                                pressure       1.00000      -0.11371
                                                              0.6987

                                mileage       -0.11371       1.00000
                                                0.6987