Draw the min line -- the one with as small a slope as you think reasonable taking into account error bars while. The slope is thus 3048 or just 625. Divide the error by the exact or ideal value not your experimental or measured value.
Convert the decimal number into a percentage by multiplying it by 100.
Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site. MIL-PRF-13830 has a complete discussi on of specifying and measuring surface figure errors but does not cover surface slope errors. Convert the decimal number into a percentage by multiplying it by 100. SE can be derived from s² and the sum of squared exes SS xx SE is also known as standard error of the estimate.