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245) The locations of the critical region boundaries for three different levels of significance:  =.

244)Possible outcomes of a statistical decision.įigure 8-5 (p. 238)The critical region (very unlikely outcomes) for  =. 236) The set of potential samples is divided into those that are likely to be obtained and those that are very unlikely if the null hypothesis is true.įigure 8-4 (p. From both perspectives a treatment is administered to a sample and the treated sample can be compared with the original, untreated population.l The hypothesis test is concerned with the unknown population that would exist if the treatment were administered to the entire population.įigure 8-3 (p. 234) Two views of the general research situation. The purpose of the experiment is to determine whether or not the treatment has an effect on the population mean.įigure 8-2a (p. It is assumed that the parameter µ is known for the population before treatment. 232) The basic experimental situation for hypothesis testing.