Does anyone here know how to calculate a standard deviation given 2 ranges and a result?
It's from a vitamin D bloodwork that I got done because I suspected it was low as I work with computers and spend all day indoors and only go out at night.
Suppose result for Vitamin D was 20.2, range is from 12-60 (lower than 12 is severe deficiency, higher than 60 is an overdose). So yeah I need to get some sun since it's on the lower end.
Anyway, they gave me an "SD%" value, this I think means "standard deviation". This value is of -32.9%
My question, how is that calculated? I mean how do you calculate the standard deviation of the result given that range?
Im not a numbers guy so I would like to know how that works. I assume someone here knows basic math to figure that out. I believe that right vitamin D helps with thinking straight and have less brainfog = more gains.
Just stand in the sun for 30 minutes ,,,, also I’d advise to have sex
Tyler Ramirez
Yeah I already did but that board is slow as fuck if not dead.
I mean cmon, there's people here doing business in college right? or some STEM guys? is anyone here literally unable to do this? I don't believe it, I think it just takes some simple math but im too much of a brainlet.
I just need to know how to calculate the standard deviation in order to apply it into other markes too
I have a lot of money now, I just want to learn and improve my health.
Dominic Powell
Standard Deviation is calculated by square-rooting Variance. Variance specifically specifically goes out of its way to get rid of negatives in its calculation, so idk how you have a SD of "-32.9%"
Ryan Scott
maybe they implied his deviation from the median is -32% of the standard deviation of a larger group?
Ayden Flores
Well, im not sure what SD means, i just supposed it means that.
Anyone has no idea where that -32.9% comes from?
Jack Ross
just asked my doc it means you have terminal cancer m8 sorry but you only have 5 minutes to live unless you reply to this post
Josiah Thompson
obviously it's in relation to the SD of the population, a single sample as in OP's can't even have a SD
Jaxon Hall
You need to know the distribution to calculate it. I'm not sure of the nomenclature but I think it means you are 32.9% below the average, for example if you surveyed 100 random people, assuming a normal distribution you'd be around the bottom 17% (17+33+50 = 100%)
Aaron Rivera
so there's no way to know without knowing what sample data they are using?
Can't this be calculated with the 2 values from the range then?
Noah Smith
Oh, so he's on the "left side of the distribution", so to say?
Brayden Bell
also take some quality liquid vit D3 you cant go under the sun, especially in winter.
Michael Young
You have to make some assumptions. If you assume it's a symmetrical normal distribution and take the average as the middle of the interval you can use the percentage and the value for example 20.2 so see where you fall the get the the SD from there. You just go on wikipedia and use the normal distribution function and see where the 32% lands which is a number between 0 and 1. You then put that number in the f(x) and 20.2 in the x and solve for the standard deviation. I don't remember how to do the first part but it should be easy
Kayden Cox
Roasty looking toasty
Isaiah Cruz
>use the normal distribution function and see where the 32% lands which is a number between 0 and 1 0.6255, right?
pretty sure SD in this context means suck dick. Vitamin D is slang for dick in some circles. Unironically jism from a healthy man will increase your vitamin D count, though rectal administration is more effective than oral.
David Nguyen
Who fucking cares about the range? The American medical board or some shit makes an educated guess about the range. There are already researchers saying that the range is too low. It also differs by country.
I take 10,000+ IUs a day for years. The docs tell me it's too much but my blood tests show I'm in the upper end of the range.
I'm white, not obese and don't have medical issues that cause low d. It runs in my family and it seems genetic that I have to take mega doses to keep it in range.
I have a friend who tests 80+ with no problems.
It's a huge range because they don't fuckin know
Ian Watson
Do you check 1,25 marker too? Did you know you can have OH 25 value high as fuck but be useless because the active metabolite is 1,25 so it what it matters?
Jackson Richardson
I have not checked it recently. I was obsessed about it like you for a while. I just continue my handful of OTC D3.
I was like you in that I saw a near immediate affect in my mood and energy which was life changing. It's so far been the cheapest panacea I've found in my life
Ryder Reyes
Yeah but I realized that these tables take the sd=1. It's hard to calculate exactly. If you just want to estimate since your number is close to 1 standard deviation take that as exact and taking that average as 36 means tha s SD= 36-20 = 16. That should be good enough
Ayden Morales
>these tables take the sd=1 Alright, but in addition to that, wouldn't we also need the Mean (which we don't have), assuming this is the function thingy you were referring to before: z = (x – μ) / σ
Charles Howard
OP asked /sci/, lmfao >what is E thing?
Thomas Stewart
Tanned woman are hot until 30, after that their skin is just rough and looks old. Pic related. A 32-year-old roastie
