The P value — the calculated probability of observing such an extreme relative risk, assuming a null hypothesis of no underlying difference in risk — can be calculated to be 0.0001 ...

Maybe they're all out there, but they are keeping their distance. Welcome to the zoo (hypothesis). The story goes that in the summer of 1950, eminent physicist Enrico Fermi was visiting colleagues ...

The P value — the calculated probability of observing such an extreme relative risk, assuming a null hypothesis of no underlying difference in risk — can be calculated to be 0.0001 ...