General Formula >The general formula for all confidence intervals is: Point Estimate+(Critical Value)(Standard Error) Margin of error (e) Margin of error(e)=(UCL-LCL)/2 Point Estimate =(UCL+LCL)/2 Confidence Interval=2*Margin of error Statistics for Ma Using Microsoft Excel Chap 7-10 Statistics for Managers Using Microsoft Excel Chap 7-10 General Formula The general formula for all confidence intervals is: Point Estimate ± (Critical Value)(Standard Error) Margin of error (e) Margin of error (e)=(UCL-LCL)/2 Point Estimate = (UCL+LCL)/2 Confidence Interval=2*Margin of error