My Math Forum  

Go Back   My Math Forum > High School Math Forum > Probability and Statistics

Probability and Statistics Basic Probability and Statistics Math Forum


Reply
 
LinkBack Thread Tools Display Modes
March 10th, 2015, 02:46 PM   #1
Newbie
 
Joined: Mar 2015
From: canuckland

Posts: 1
Thanks: 0

Interpolating (I think?) from a bell curve.

1100 -- 5%
1500 -- 10%
2000 -- 25%
2250 -- 50%
2731 -- 75%
3200 -- 90%
3900 -- 95%
4100 -- 99%
5800 -- 99.993%
7728 -- 99.999991%

I want to find what 4900 correlates to.

I've tried a bunch of things but apparently everything I do is wrong or doesn't seem to match up.
marlan is offline  
 
March 10th, 2015, 08:20 PM   #2
Global Moderator
 
CRGreathouse's Avatar
 
Joined: Nov 2006
From: UTC -5

Posts: 16,046
Thanks: 938

Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms
The points don't match up to a normal (=guassian = bell-curve) distribution very well. If I ignore that and take the two closest points, 99% is 2.326 standard deviations up and 99.993% is 3.808, so interpolating 4900 as 9/17 of the way from 2.326 to 3.808 gives 3.023 standard deviations up, so 99.875% or so.
CRGreathouse is offline  
Reply

  My Math Forum > High School Math Forum > Probability and Statistics

Tags
bell, curve, interpolating



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help with Bell Curve Graphs Andrewnd Probability and Statistics 2 April 6th, 2014 12:45 PM
Bell Curve Packing instead of Sphere Packing BenFRayfield Advanced Statistics 0 February 9th, 2013 07:54 PM
Help me generate a bell curve, please! bob9119119 Algebra 24 January 27th, 2012 09:12 PM
Bell curve percentiles after eliminating some possibilities. Submerged06 Advanced Statistics 3 July 25th, 2011 02:22 PM
Wat is the meaning of Standard deviation in a bell curve ? arun Advanced Statistics 5 January 14th, 2008 12:16 PM





Copyright © 2019 My Math Forum. All rights reserved.