[ U_{95} = \sqrt{B^2 + (t_{95} \times s_{\bar{x}})^2} ]
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Formula from PDF: [ b_r = \sqrt{\sum_{i=1}^{N} \theta_i^2 b_i^2} ] Run the test at steady-state conditions. Take at least 30 equally spaced data points (the PDF recommends 30 for large samples, 10 for preliminary). Calculate the standard deviation (Sx) of the mean. [ U_{95} = \sqrt{B^2 + (t_{95} \times s_{\bar{x}})^2}