iid is an acronym for independent and identically distributed. Many statistical methods assume that the data are iid; that is, that each observation comes from the same distribution and is independent of other observations.
Questions tagged [iid]
248 questions
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Inferring speed from non-I.I.D. GPS data
I have a collection of GPS log of many vehicles. Each row has timestamp, location, speed and vehicle number. I'd like to infer to distribution of speed, or at the minimum, the portion of time they are stationary v.s. when they are moving. The vendor…
Wai Yip Tung
- 213
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What does it mean by independently and identically distributed random variables?
A coin toss is referred as IID in several websites. What I want to know that if I'm understanding the concept right.
If X denote a random variable which means the "result of a coin toss" then $x_1, x_2, ... , x_n$ are the results of repeated coin…
Jahid Nur
- 43
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What are the implications of not being independently and identically distributed?
In my basic statistics course we always assume that the sample observations are iid. I get why they would be iid (eg. in the case of a coin toss) and I also intuitively get that if they are not iid then the observations we get would probably have…
Carrie
- 21
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Can independent non-identically distributed random variables be converted into i.i.d. random variables?
This paper gives the i.ni.d. example of "measurements accurate to the nearest foot may be combined with measurements accurate to the nearest inch". Can we simply pool that data to satisfy i.i.d.? (The disadvantage being that pooling throws away…
Antlers
- 43
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iid condition of SPC
The control chart usually requires that the observed values meet the conditions of independent and same distribution, but the sample data is a time series with autocorrelation. How should the data be processed to eliminate the autocorrelation
xin liu
- 11