Continuous or Discreet
Six Sigma – iSixSigma › Forums › General Forums › Training › Continuous or Discreet
 This topic has 10 replies, 6 voices, and was last updated 9 years, 9 months ago by MBBinWI.

AuthorPosts

March 27, 2012 at 5:06 am #54007
K S Alok RanjanParticipant@ksalokranjan Include @ksalokranjan in your post and this person will
be notified via email.Is it not correct to say, Data are never Continuous or Discreet, rather the units that define the data are.
0March 27, 2012 at 5:35 am #192757
Robert ButlerParticipant@rbutler Include @rbutler in your post and this person will
be notified via email.From Agresti Categorical Data Analysis 2nd Edition pp. 3 ” Variables are classified as continuous or discrete, according to the number of values they can take. Actual measurements of all variables occurs in a discrete manner, due to precision limitations in measuring instruments. The continuousdiscrete classification, in practice, distinguishes between variables that take lots of values and variables that take few values. For instance, statisticians often treat discrete interval variables having a large number of values (such as test scores) as continuous, using them in methods for continuous responses.”
0March 27, 2012 at 10:14 am #192769
MBBinWIParticipant@MBBinWI Include @MBBinWI in your post and this person will
be notified via email.@ksalokranjan – as Robert quotes, all measurements are inherently discrete due to at some point needing to put a limit on decimals. However, your query postulated that the data units are continuous/discrete. This would be wrong, as the units “degrees” for temperature is clearly continuous (infinite possible values), but the data (recorded observation) is clearly limited in decimal digits having a finite number of reading levels that can be recorded, thus are discrete. So, my answer is exactly opposite of your proposal, and data are always discrete (although we often choose to treat it as continuous), and units can be discrete or continuous.
0March 27, 2012 at 10:51 am #192775I’m not smart enough to understand what was said above but here is how I make the distinction……is it measured or counted? can it logically be divided into units over an essentially infinite scale of measurement.
0March 27, 2012 at 12:36 pm #192780
MBBinWIParticipant@MBBinWI Include @MBBinWI in your post and this person will
be notified via email.@Darth – ah, but dear Dr. Darth, what if I’m counting the number of people going to each Brewers game for a season? 10’s of thousands per individual reading and more than a hundred readings – so discrete (counted) or continuous?
0March 27, 2012 at 1:59 pm #192787
gomezadamsMember@spazwhatsup Include @spazwhatsup in your post and this person will
be notified via email.How about superfelous. The Brewers?
Can’t count them on any scale.0March 27, 2012 at 2:05 pm #192789
Chris SeiderParticipant@cseider Include @cseider in your post and this person will
be notified via email.I miss the banter….
@MBBinWI Let’s say the number of people were counted by ones…I’d treat as continuous as I’m sure you would.It’s always an interesting discussion depending on who’s in class and who’s a stickler or who’s a smart alec.
0March 27, 2012 at 3:24 pm #192792@MBBinWI @cseider As Gomez suggested we might only need one hand to count the number of Brewer fans attending a game. I believe we have covered this issue in the past. The underlying characteristic of counting people is definitely discrete. We count, we don’t measure and they are either a person or not. On the other hand, large counts can take on the behavior of continuous data if we have enough and the range of the counts is wide enough. Therefore, in reality, we have discrete and continuous and a Gray World in which counts can be treated as continuous even though that doesn’t change the underlying notion that it is still a discrete count.
0March 27, 2012 at 9:47 pm #192797
K S Alok RanjanParticipant@ksalokranjan Include @ksalokranjan in your post and this person will
be notified via email.Glad to see so many suggestions. Let me paraphrase my original intent with an example. I wanted to ask,
“Is it not correct to say, Data (for example 8 or 13) are never Continuous or Discreet, rather the units (for example 8 as in age of a student or 13 as in number of students in section) that define the data are.”
@MBBinWI, @rbutler got it correct. @rbutler is close to what I wanted to say. He have given the term ‘variable’ to what I referred as ‘units’. And about the unit “degrees”, indeed it is discreet. About one of the reading is continuous, I am not sure!0March 27, 2012 at 9:51 pm #192798
K S Alok RanjanParticipant@ksalokranjan Include @ksalokranjan in your post and this person will
be notified via email.March 28, 2012 at 7:47 am #192811
MBBinWIParticipant@MBBinWI Include @MBBinWI in your post and this person will
be notified via email.@ksalokranjan – ah, but if I have sufficient numbers of counted items, and if the counts have sufficient levels, then I can treat them as continuous.
Likewise, if I have temperature readings (let’s choose deg C as it has a wider coverage range per degree) that I stop the digits at the whole number level (no decimals), then I might only end up with a few different numbers, which I might choose to evaluate as a discrete variable.
So, in true MBB fashion, my final answer is: It depends!And to those of you trying to yank my chain about the Brew Crew, sorry – I’m not invested in the team or their success or lack of. But good try.
0 
AuthorPosts
You must be logged in to reply to this topic.