Using a three-stage probability proportion to size sampling method, the NHSS randomly selected 30 counties in Sichuan Province in the first stage, one town from each sampled counties in the second stage, and one THC from each sampled town in the third stage for the Prescription Survey.
Fig. 3 Piper plots of ions in water samples from the sampling towns along the Jimi River and its tributaries.
Fig. 4 Schoeller logarithm diagram for ions in water samples from the sampling towns along the Jimi River and its tributaries.
A multistage sampling method was used: stage 1, three regions were randomly selected from the whole of TGRR; stage 2, three towns were randomly selected from each of the sampled region; stage 3, four villages or communities were randomly selected from each of the sampled towns; stage 4, households within each village or community were listed, resulting to 110 households being randomly selected.
At night, ruddy-faced tourists gather in San Pedro to sample the town's lively night life.
These characteristics included the magnitude of modeled flow (defined by tertile as low, medium or high), sampling position along pipe (beginning/middle or end), season (spring or autumn), sampling fixture (tap, hydrant or unknown), sampling personnel, town, and pipe installation year (1968-1972, 1977-1980, 1977-1980).
A visit to St.-Remy is an ideal way to sample small-town Provencal life.
D'Urso found the marshmallows she'd sampled around town "too gritty or chalky" so she built a better one; a panoply in fact, of edible puff pillows at $1 a piece.
Since local water systems test for atrazine as infrequently as once a year, the E.P.A. has required that the companies manufacturing the chemical, primarily Syngenta, monitor the drinking water of a sample of towns — as many as 154 communities — as often as once a week.
