In the Unit 4 Discussion you were asked to create a research question and then convert that question into a null hypothesis and alternative hypothesis. You also determined if your alternative is one-tailed or two-tailed. Finally, you predicted the expected results from your study. In this unit you will build on that work and complete the hypothesis testing concept.
In this week's Discussion please complete the following:
- Restate your Research Question and Hypotheses: In Unit 4 you began to study the use of hypothesis testing to answer research questions. Rewrite your research question, null hypothesis, and alternative hypothesis from Unit 5 here. Make any needed improvements or corrections based on feedback from the Unit 4 Discussion Board.
- Population(s) and Sample(s): Given your research question and hypothesis above, what would be your population of interest? Describe the sample you might collect, including sampling method and size to conduct your test of hypothesis.
- Select a Level for Alpha: Select the level of alpha (α) that you would use in testing your hypotheses. Be sure to think about the criticality of committing a Type I or Type II error before just selecting the conventional α = .05. Which type of error is worse, and why?
- Power and Effect Size: Suppose the effect size of your research study is very large. What does this tell you about your results? If you were not able to reject the null hypothesis and determined that the statistical power of the study was low, what could you do to increase the statistical power if you were to replicate your study?
Here is my unit 4 post that these questions will be used for:
A. My research question is investigating whether texting (SMS, Email) is affecting our ability to read facial expressions or not.
B. Ho: Texting (SMS, Email) is not affecting our ability to read facial expressions. Ha: Texting (SMS, Email) is affecting our ability to read facial expressions.
C. This is a two-tailed hypothesis test because my alternative "Ha" research hypothesis is looking at the ability to write that are not equal to (significantly different from) 0.
D. My expected conclusion from the above hypothesis is to reject the null hypothesis and accept the alternative hypothesis that texting (SMS, Email) is affecting our ability to read facial expressions.