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Lognormal distribution

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    Lognormal distribution

    I am trying to recreate a lognormal distribution from a paper I'm reading:http://www.cdc.gov/ncidod/eid/vol10no4/03-0509.htm

    The paper says "Lognormal distributions were fitted to these data by maximizing the log-likelihood function. In subsequent modeling, the duration of individual latent periods and infectious periods could then be taken from the fitted lognormal distributions in Figure 1 with means (SD) of 4.3(1.8) and 2.5(1.2) days.Figure 1"

    I've been trying to use the lognormdist function in excel to recreate the distribution in the paper but have been unsuccessful, can someone help me figure out how to input the mean and SD into excel so that my curves looks like the ones in figure 1 of the paper?

    Thanks!

  2. #2
    Forum Expert shg's Avatar
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    Re: Lognormal distribution

    See the attachment. Plug your data into col A. Adjust the formulas in col A to cover your data, and use the model set up in Solver to compute the best-fit u and s for the distribution.
    Attached Files Attached Files
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