How to determine a p-level from a percentage.

Question

How do you convert a percentage to a p-level?

Answer 1

Hello Susan,

 

A p level is just a probability in decimal form, so you only have to take the percentage divided by 100%.  For example, if the percent chance of an event happening is 25.3%, then:

 

p=(25.3%)/(100%)=.253

 

You can also work this the opposite direction.  If you have p=.1216, then:

(.1216)*(100%)=12.16%

 

So a p of .1216 means that there is a 12.16% chance of the even happening.

 

Also note that as the percentage of certain can never be less than 0 or more than 100%, must always be between 0 and 1.