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.
1 Experimental Uncertainties Measurements of any physical quantity can never be exact. One can only know its value with a range of uncertainty. If an experimenter measures some quantity X, the measurement must be written with an uncertainty: X Â± Î´ X. This expresses the experimenterâs judgment that the âtrueâ value of X lies somewhere between X - Î´ X and X + Î´ X. I. Uncertainties of Measurements 1.