a.Are the following conclusions warranted? Why or why not? The results were significant at the .05 level. This means that the results proved that the null hypothesis was false and that the independent variable caused the results. If the study were repeated 100 times, these same results would occur 95 times. b. What is the […]
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a. What does it mean that the null hypothesis is a straw man to be knocked down? In your answer, describe the purpose of null hypotheses and alternative hypotheses. b.What is meant by the term directional hypothesis, and what information would a researcher need to form such a directional hypothesis? c. What is a parametric
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a. What type of parametric test would you use, and why, in the following scenario? The skills of male and female twin pairs in mathematics are assessed, and the average math performances (i.e., scores on a standardized test) of the gender groups are compared. What type of nonparametric test could you use and why (i.e.,
a.What is meant by a true experimental design? (In your response, discuss the basic design features of true experimental designs.) b. What are quasi-experimental designs? How are true experimental and quasi-experimental designs similar, and how are they different? c. Can quasi-experimental designs determine cause-and-effect relationships? Explain. d. How are threats to the internal validity of
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a. How do true experimental designs control for threats to external validity? What are some concerns you might have? b. Are quasi-experimental designs more or less useful than true experimental designs in determining the external validity of the investigation? Why or why not? c. What type of design is recommended if you are concerned that
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a. Did authors’ analysis procedures address the stated purpose of the study? Why or why not? b. According to the authors, how did the results of study relate to previous research findings? c. According to the authors, what general conclu‑sions can be made about the results? d. What are some potential threats to the internal
a. In what three prominent areas have development and refinement of survey research methods taken place? Have you or your family been affected directly by one or more of these areas? Explain. b. In what three areas can the purpose for conducting surveys be categorized? Provide an example of each area you may be interested
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a. What are the factors in choosing a survey method? Provide a description of each. b. How does the amount of time and money you have affect how you would conduct a survey? c. What are the two important points researchers should consider when designing a survey? d. What is a sampling frame? In your
a. What did the survey examine, and what were the sampling procedures? b. Who were the participants in the survey, and what was the response rate? c. Describe the development of the second part of the survey. d. In terms of the use of ANOVA, why did research‑ersset the alpha level at p < .01?=””>
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a. What findings were consistent with the research‑ ers’ predictions (i.e., hypotheses)? b. Teachers tended to use evidence-based prac‑tices, yet 27% of their students, on average, were experiencing difficulty with spelling. How do the researchers account for this finding? c. In the Discussion, the researchers describe adap‑tation of instruction for weaker spellers. They reiterate that
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