The values in the table below are measured maximum breadths (in millimeters) of male skulls from different epochs. Changes in head shape over time suggest that interbreeding occurred with immigrant populations. Use a 0.05 significance level to test the claim that the different epochs all have the same mean.

4000 B.C   1850 B.C.   150 A.D.
130   129   128
138   135   138
125   136   135
129   138   139
132   137   141
135   128   142
132   136   136
134   138   145
138   134   137

Find the P-value.