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Explain why it is necessary to have a clearly stated hypothesis before beginning to collect data. A hypothesis is necessary because, “The primary research question should be driven by the hypothesis rather than the data”( https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912019/). Before the start of any research  the research question and hypothesis should be developed. Failure to do so  could result in counter productivity for the researcher . In this case the researcher must work backwards using the data for the purpose of developing the “question.” So this doesnt make much sense, because the question (hypothesis) is asked  to assist the researcher with  finding the answer. A  good hypothesis is based on a good research question which then  drives data collection for the study. An example of a good hypothesis is provided by a article “in a research study comparing computer-assisted acetabular component insertion versus freehand acetabular component placement in patients in need of total hip arthroplasty, the experimental group would be computer-assisted insertion and the control/conventional group would be free-hand placement. The investigative team would first state a research hypothesis. This could be expressed as a single outcome (e.g., computer-assisted acetabular component placement leads to improved functional outcome) or potentially as a complex/composite outcome; that is, more than one outcome (e.g., computer-assisted acetabular component placement leads to both improved radiographic cup placement and improved functional outcome)” ( https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912019/). If a hypothesis is written correctly it will support good research query and also have an influence on the remainder of the research design. The ability to ask good questions that lead to great research, are ultimately determine the outcome of a study.Explain why it is or why it is not necessary for all research projects to be directed by a hypothesis. According to the  research article it is possible that a study that is comprised of  “Multiple statistical testing of associations from data previously collected” could yeild favorable results. But this is not always the case. Please keep in mind that all research is not validated and that it is important to retest, experiment or independantly analyze data before summarizing your findings. 


Furugia, P. (2014). Research questions, hypotheses and objectives retrieved from                          https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912019/ on 4/26/17.    


Explain why it is necessary to have a clearly stated hypothesis before beginning to collect data.The purpose of the hypothesis is to state the researcher's educated guess, even though evidence has not been provided.  Also it allows readers to understand the research question and to guide the researcher to providing information based on the research question and not the data.  According to NCBI, "The research or clinical hypothesis is developed from the research question and then the main elements of the study — sampling strategy, intervention (if applicable), comparison and outcome variables — are summarized in a form that establishes the basis for testing, statistical and ultimately clinical significance" (Farrugia, Petrisor, Farrokhyar, & Bhandari, 2010).  Researchers who also have experience will understand the importance of a clearly stated hypothesis.  In the search for collecting data, they hypothesis will guide what research is to be conducted.  Researchers will chose to perform a qualitative, quantitative or mixed research method, depending on the topic they choose.  

  • Explain why it is or why it is not necessary for all research projects to be directed by a hypothesis.

If a research project is not directed towards the hypothesis, then the hypothesis is never tested.  The hypothesis tests the relationship between variables, serves as the foundation for performing experiments and is testable.  Some research is not guided by a hypothesis such as; developments in science, engineering, breeding of plants and even sometimes animals and providing services.  A general purpose and plan would still need to be provided, to keep the research on track and accountable to the purpose it is to perform.   References Farrugia, P., Petrisor, B. A., Farrokhyar, F., & Bhandari, M. (2010). Research questions, hypotheses and objectives. Canadian Journal of Surgery, 53(4), 278–281.

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