author: denise f polit

... study and, typically, its context and significance. Generally, the problem statement should be broad enough to include central concerns but narrow enough in scope to serve as a guide to study design. Example of a problem statement from ...

... statement is an expression of the dilem- ma or disturbing situation that needs investigation for the purposes of providing understanding and direction . A problem ... Research Problems , Research Questions , and Hypotheses 73.

... examples of multivariate statistics , pro- vides an illustration of adjusted means . When ANCOVA results in a significant group F test , researchers can reject the null hypothesis that the adjusted group means are equal . As with ANOVA ...

Thoroughly updated and revised to emphasize the link between research and evidence-based practice, this Ninth Edition of a classic textbook presents state-of-the-art methods for conducting high-quality studies.

... describe an RCT as prospective . A second broad class of nonexperimental studies is descriptive research . The purpose of descriptive studies is to observe , describe , and document aspects of a sit- uation . For example , an ...