Description
Your Assignment has 2 parts:
Part 1: Explain in 1–2 paragraphs the four steps involved in hypothesis testing and how a statistical decision is made based on computing a test statistic and transforming the sample mean into a z-score (probability score).
Part 2: Read the scenario below. Then, follow through each of the steps of hypothesis testing to answer the question presented at the end of the scenario:
All the students at a university took the GRE (Graduate Record Examination), a standardized test that attempts to measure graduate readiness. The GRE is scored on a 130–170 scale in each section and the verbal scores were compared. The scores were normally distributed with μ = 140 and σ = 15. A sample of students, n =100, then took a GRE course to improve their test scores. Following the course, the average score for this sample is M = 155. Is there evidence that the GRE course influenced the verbal test scores?
In 1–2 pages, state the following in order based on the research data given above:
The research question .
The null and alternative hypotheses.
The alpha level and the critical region.
Compute the test statistic using a z-score.
Determine the 95% confidence intervals.
Make a decision about the null.
Find the effect size using Cohen’s d and state why the effect size should be reported.
Also, include the power of the hypothesis test. Why might the power be used? What factors affect the power?
Summarize the above information in a table (one or two tables based on how you choose to format).
In your conclusion, provide a brief explanation of what the implications for social change might be, based on the results of your data.
Support your summary using appropriate scholarly citations and references. Use proper APA format.
