what is an outlier??!!!?? (sorry but I always forget!)
2006-08-14 12:59:25 · 9 answers · asked by ♥dylan♥sprouse♥ 2 in Science & Mathematics ➔ Mathematics
a number that is far away from the majority of a group of numbers ie 1,2,1,3,2,1,4,1,2,3,10
10 is an outlier
2006-08-14 13:02:22 · answer #1 · answered by doug 2 · 1⤊ 0⤋
If you have a bunch of data from an experiment and they follow a nice trend but one data point is way off (and clearly because you think you made a mistake in that particular experiment) you do a statistical test to try and show that it doesn't belong so that you can get a better fit when you leave it out.
I don't know that there is a strict statistical definition of an outlier.
2006-08-14 23:20:58 · answer #2 · answered by primenumber 3 · 0⤊ 0⤋
ahh...my teacher teach me about that ...
an outlier is a number that is not belong to the group...it means it is so not possible...for example the temperatures in NJ for 1 weeks are 80 , 83, 90 , 92 ,90 , 567
the outlier is 567...people are all dead in that temp..
2006-08-14 20:17:03 · answer #3 · answered by jack_k744 3 · 0⤊ 0⤋
a number in a set of numbers that doesn't match the rest.
95, 96, 95, 11. 11 would be the outlier.
2006-08-14 20:15:48 · answer #4 · answered by roxy angel 2 · 0⤊ 0⤋
1. One whose domicile lies at an appreciable distance from his or her place of business.
2. A value far from most others in a set of data: “Outliers make statistical analyses difficult” (Harvey Motulsky).
3. Geology. A portion of stratified rock separated from a main formation by erosion.
2006-08-14 20:04:05 · answer #5 · answered by Um?Duh? 1 · 0⤊ 0⤋
Doug's got it right - usually when you are doing box-and-whiskers plots, for example, if there is a number that is much smaller or much bigger than most, that is an outlier, and you ignore it
2006-08-14 20:05:22 · answer #6 · answered by MollyMAM 6 · 0⤊ 0⤋
outliers can be found by using 1.5*IQR
IQR=Inter Quartile Range
IQR=Q1-Q3
outliers=Q3+(1.5*IQR)
Q1-(1.5*IQR)
values found between these 2 last equations are not outliers.
2006-08-14 20:11:17 · answer #7 · answered by Navdeep B 3 · 0⤊ 0⤋
The digits in the outside of your parenthesis in Algebra.
2006-08-14 20:03:31 · answer #8 · answered by metrobluequeen1 3 · 0⤊ 1⤋
Just remember it greatly influences the result.
http://mathworld.wolfram.com/Outlier.html
2006-08-14 20:07:46 · answer #9 · answered by ~ 4 · 0⤊ 0⤋