Quote:
Originally Posted by Cecily
[You must be logged in to view images. Log in or Register.]
So to start this off, I’ve taken a statistics class years ago at a 4y college and all I learned was how to input numbers into a program. I’d really like to relearn the useful information to help me understand research journals, but for now I have a question about calculating percentile rank.
I have data for 5th%, 95th%, mean, and total number.
Can I use this information to plug in a number to determine its percentile rank?
Ex:
My weight = 196 lbs
Mean = 153.2 lbs
5th percentile = 105.5 lbs
95th percentile = 225.6 lbs
N = 8764
How do I figure out my rank?
Using data from this table:
http://andreaportman.tripod.com/averages.html |
I
think you can't, because you don't have enough info. But stats isn't my forte so hopefully someone else has a better answer.
The way I see it ... the mean is 153.2 lbs right? That could be because there was one insanely fat fuck on the heavy end, or it could be a lot of "on the heavier side but not that heavy" people on that end. Same deal on the other end, you could have like three bulimic people who weigh as much as a concentration camp survivor, or you could just have a lot fairly fit people. Either case could give you that same mean of 153.2 but your placement will be different depending.
The only way to truly know where you place in a dataset is to have that whole dataset. That being said, with the percentiles I would imagine you could guess pretty close to the correct answer by using math ... but again stats aren't my strong suit so someone else would have to provide that math.