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I would like to develop an indicator. I was able to research 33 values from a population of about 1000 objects. It is now easy to calculate the mean value and a confidence interval. Is this a legitimate procedure? Especially, plotted, the distribution of my values is rather U-shaped; can I assume a normal distribution at all? If not, how should I adjust my approach (e.g. should I first try to approximate the "true" -then presumably somehow quadratic- function from my data)? Is there a more appropriate method to build an indicator based on the available data?

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  • $\begingroup$ Please describe your data a little more. What is the dimension? What type of data (discrete, continuous)? What do you mean by "indicator"? What is your ultimate goal? $\endgroup$
    – frank
    Jul 14 at 12:21
  • $\begingroup$ I want to estimate the CO2eq. potential of a process. In one category I only have data on total kg input, subsuming about a 1000 different inputs. So I need an indicator for kgCO2eq./kg input in that category. I found kgCO2eq./kg values for 33 of them; continuous data. My ultimate goal is to create an indicator for that input category (subsuming the 1000 inputs) on the basis of the values I found for 33 of them, to ideally get mean, upper and lower boundary, to finally provide a "best guess, best and worst case"-scenario. $\endgroup$
    – Murv
    Jul 14 at 13:02

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