share email twitter ⋅ join discord whatsapp(2ck)
Free 120  NBME 24  NBME 23  NBME 22  NBME 21  NBME 20  NBME 19  NBME 18  NBME 17  NBME 16  NBME 15  NBME 13 
search for anything NEW!
NBME 20 Answers

nbme20/Block 1/Question#26 (32.5 difficulty score)
Serum cholesterol concentrations are measured ...
16%πŸ”,πŸ“Ί
tags:

Login to comment/vote.


Tutor box

Members from the Leaderboard offering 1-on-1 help: Want to be listed here? Email us!

 +7 
submitted by strugglebus(172),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

oS ouy onwk htta 5%6 of teh tdaa iwll fall twihin 1SD of het .amne So if uyo racsttbu 0516-0 oyu liwl teg .35 chWhi easmn ttah autbo %16 illw lalf aoebv nda %61 wlli allf woble 1 S.D ehyT rae nkasig rfo woh yamn wlli llaf eabvo 1 .SD I'm seru hteer si a ettebr wya fo dnoig sth,i ubt staht hwo I gto it oll.

sympathetikey  Same! +6  
sympathetikey  Except according to FA, it's 68% within 1 SD, so 34%, which split in half is 17%. +2  
amirmullick3  Sympathetikey check your math :D 100-68 is 32 not 34, and half of 32 is 16 :) +8  
lilyo  Can anyone explain why we subtract 68 from 100? This makes me think that we are saying its 35% of the data that falls within 1SD as opposed to 65. HELLLLLLP +  
sallz  @Lilyo If you consider 1 SD, that includes 68% of the population (in this case, you're saying that 68% of the people are between 296 and 196 (1SD above and 1 below). This leaves how many people? 32% outside of that range (100-68=32); half of those would be above 296 and the other half below 296, so 16% +5  



 +2 
submitted by smpate(15),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

oT etg ihts eon rgih,t oyu duwlo aehv ot kwon thta noe addtnrsa nvitoeaid ayaw from eth aemn no a bell eurvc si 3%4 on eerhit ides. rtfeA taht ti wlodu eb ernahot %1.35 tub( oirzmmiegn taht si olw dy)iel. koniLog ta teh fpieicsed aeg rgpuo, ew ntwa ot kwon owh mchu is gaerert than teh emna lups 1 dansadtr n.adiveoit oe,refTher %05 (hte a)men pusl %34 (1 rdatasnd oveadi)nti si 8%4. The setr si 08-014 = .16

I odfun ihts maige olnien fro tlracyi

t.N1olE/dmaeGt6ho/is:s/aonxajpmsi4toraw/0cim//ta2dcna.naitthp/s0t.rEcwmpp-mculpwr1laetpphglw

bbr  Is the plus/minus sumbol always used for standard deviation? Or can it be used for confidence interval. +