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PrivateJellyfish10279
Reviewing Statistics Objectives – by completing this activity,…
Reviewing Statistics Objectives – by completing this activity, you will accomplish the following:
Determine the appropriate statistical test for each scenario
Practice formulating hypotheses and understanding what the results will show for each test
Compile the information needed for beginning data collection
Student Instructions: answer in a few short sentences each of these questions.
PART 1 – T-Test and ANOVA
1. A research study has been conducted on differences in stress levels among different aged adults. 10 adults over 70, 10 adults between 40 and 60, and 10 between 20 and 30 were asked to rate their stress levels on a validated measure. Higher scores indicate higher levels of stress. Answer the questions below about this scenario:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why? What are the degrees of freedom here?
What will the results of this study tell us? Is post-hoc testing necessary?
2. The average life expectancy for males in the United States is 78 years of age. A study was done to see if a sample of people from the Lowcountry have a similar average life expectancy. The 40 most recent male deaths in the Lowcountry were found using public record and their ages were documented. Answer the questions below about this scenario:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why? What are the degrees of freedom here?
What will the results of this study tell us? Is post-hoc testing necessary?
3. Researchers wanted to understand how adolescents who are raised by overbearing parents differ in confidence from those that do not have overbearing parents. Two groups were created from 50 total participants and they were asked to report on their confidence in a variety of situations. Answer the questions below about this scenario:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why? What are the degrees of freedom here?
What will the results of this study tell us? Is post-hoc testing necessary?
PART 2 – Correlation, Regression, and Chi Square
1. A researcher wants to figure out if there is any kind of relationship between the amount of cereal consumed on the weekend and the amount of time spent watching cartoons. If he has 100 parents report on their children’s behavior, answer the following questions about this study:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why? What are the degrees of freedom here?
What will the results of this study tell us?
2. A researcher wants to test whether or not his new children’s toy is equally interesting to both boys and girls, so he expects that gender will be independent of preference for the toy. If he has 100 children try playing with the toy, answer the following questions about this study:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why? What are the degrees of freedom here?
What will the results of this study tell us?
3. A researcher wants to find if age predicts life satisfaction. Previous studies have shown there is a relationship so he wants to see if one predicts the other. He has 75 participants report on their life satisfaction and give their age. Answer the questions below about this scenario:
What is the null hypothesis in this study?
What is the alternative hypothesis in this study?
What is the appropriate statistical test to use here and why?
What will the results of this study tell us?
