Each of the following processes involves sampling from a population. Define the population, and state whether it is tangible or conceptual.
a. A chemical process is run 15 times, and the yield is measured each time.
b. A pollster samples 1000 registered voters in a certain state and asks them which candidate they support for governor.
c. In a clinical trial to test a new drug that is designed to lower cholesterol, 100 people with high cholesterol levels are recruited to try the new drug.
d. Eight concrete specimens are constructed from a new formulation, and the compressive strength of each is measured.
e. A quality engineer needs to estimate the percentage of bolts manufactured on a certain day that meet a strength specification. At 3:00 in the afternoon he samples the last 100 bolts to be manufactured.
(a) The population consists of all the times the process could be run. It is conceptual.
(b) The population consist of all the registered voters in the state. It is tangible.
(c) The population consist of all people with high cholesterol levels. It is tangible.
(d) The population consist of all concrete specimens that could be made from the new formulation. It is conceptual.
(e) The population consist of all bolts manufactured that day. It is tangible.
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