Changes

[[File:Barrie prob.jpg|border|600 px]]

[[File:Barrie prob.jpg|border|600 px]]

But the patterns aren't very easy to understand like this. The cumulative distribution function uses the same λ and is often a more useful way to understand the data.  

But the frequencies of the different rainstorms aren't very easy to understand like this.  

 

The cumulative distribution function uses the same λ and is a more useful way to read the data.  

<math>F\left(x,\lambda\right)=1- e^{-\lambda x}</math>

<math>F\left(x,\lambda\right)=1- e^{-\lambda x}</math>

The 90th percentile event is the rainstorm for which 90% of all rainstorms are this depth or less. In this example, using a very limited data set it was found to be 20 mm.

The 90th percentile event is the rainstorm for which 90% of all rainstorms are this depth or less. In this example, using a very limited data set it was found to be 20 mm.