Tahun : 2008 Pengarang : Dennis D. Wackerly Penerbit : brooks /cole Ket : Statistical techniques are employed in almost every phase of life. Surveys are designed to collect early returns on election day and forecast the outcome of an election.
Consumers are sampled to provide information for predicting product preferences.
Research physicians conduct experiments to determine the effect of various drugs and
controlled environmental conditions on humans in order to infer the appropriate treatment for various illnesses. Engineers sample a product quality characteristic and various controllable process variables to identify key variables related to product quality.
Newlymanufactured electronic devices are sampled before shipping to decide whether
to ship or hold individual lots. Economists observe various indices of economic health
over a period of time and use the information to forecast the condition of the economy
in the future. Statistical techniques play an important role in achieving the objective
of each of these practical situations. The development of the theory underlying these
techniques is the focus of this text. Ketegori : STATISTICS