W San Francisco. An electric urban retreat in heart of the SoMa district. W San Francisco Hotel is a gathering place for art exhibitions, film screenings, fashion and music events. Bask in panoramic views of the Bay Bridge and the city skyline at W San Francisco, across from the beautiful Yerba Buena Gardens.
It is used, along with significant digits, to indicate the precision of a measurement. Thus, in the two-significant-digit measurement 5.4 0.2 meters, the uncertainty interval is 0.2 meters. This means that the true value of the measurement is believed to lie between 5.2 meters and 5.6 meters.
This position is expressed in the GUM (3.3.1), where it is suggested that measurement uncertainty reflects the lack of exact knowledge of the value of the measurand''. The corresponding state of knowledge is best described by means of a probability distribution over the set of possible values for the measurand. Evaluation of measurement data â Supplement 1 to the Guide to the expression of uncertainty in measurement â Propagation of distributions using a Monte Carlo method JCGM 101:2008. 2  M. R. Bottaccini (1975).