Exercise

What can you conclude from this analysis?

All but one of the following constitute reasonable conclusions from our analysis of earthquakes. Which one does not?

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The seismicity, as measured by the b-value, is comparable before and after wastewater injection.

Earthquakes are over 100 times more frequent in Oklahoma after widespread wastewater injection began.

Oklahoma has a smaller b-value than the Parkfield region, so the Parkfield region has more earthquakes.

Oklahoma has a b-value smaller than the Parkfield region, so a randomly selected earthquake above magnitude 3 in Oklahoma more likely than not has a smaller magnitude than one above magnitude 3 randomly selected from the Parkfield region.

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Exercise