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.
Nominal variable redirects here. For the economics usage, see Real versus nominal value (economics). Level of measurement or scale of measure is a classification that describes the nature of information within the numbers assigned to variables. Psychologist Stanley Smith Stevens developed the best known classification with four levels, or scales, of measurement: nominal, ordinal, interval, and ratio.