Garmin Xero C1 Pro chrono

[jasper2408]

My program got real close to your amounts for each SD Zen.

Standard Deviation (SD)
= sqrt(1/(N-1) * ((X1-M)^2 + (X2-M)^2 + .... +(XN-M)^2))
= sqrt(1/(5-1) * ((2653.21-2650.388)^2 + (2678.33-2650.388)^2 + (2652.38-2650.388)^2 + (2627.82-2650.388)^2 + (2640.20-2650.388)^2))
= sqrt(1/4 * ((2.82181640625004)^2 + (27.9418164062499)^2 + (1.99181640625011)^2 + (-22.5681835937498)^2 + (-10.1881835937502)^2))
= sqrt(351.4493)
= 18.74698

Population Standard Deviation (SD)
= sqrt(1/(N) * ((X1-M)^2 + (X2-M)^2 + .... +(XN-M)^2))
= sqrt(1/5 * ((2653.21-2650.388)^2 + (2678.33-2650.388)^2 + (2652.38-2650.388)^2 + (2627.82-2650.388)^2 + (2640.20-2650.388)^2))
= sqrt(1/5 * ((2.82181640625004)^2 + (27.9418164062499)^2 + (1.99181640625011)^2 + (-22.5681835937498)^2 + (-10.1881835937502)^2))
= sqrt(281.1594)
= 16.76781