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Method to compute confidence interval for proportion used in SPSS charts

  • 1.  Method to compute confidence interval for proportion used in SPSS charts

    Posted Wed July 26, 2023 03:53 PM

    What method to compute confidence interval for proportion does SPSS use in charts (say, for barcharts with error bars)? I could not find any information on that.

    It seems (visually, by experimenting with reference lines on a chart) to me that GRAPH command (Legacy graphs) uses Jeffreys approach. As for GGRAPH/GPL, I am less sure - it looks like SPSS might be changing the method depending on the sample size, as like as not.

    Can SPSS statisticians/developers answer it to me? What method is used.



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    Kirill Orlov
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  • 2.  RE: Method to compute confidence interval for proportion used in SPSS charts

    Posted Wed July 26, 2023 04:00 PM
    My recollection is that GRAPH does use Jeffreys, but I don't know what GGRAPH uses--



    Original Message