Unit 10 Project

Progress Check

Use this activity to assess whether you can:

• Use StatCrunch to conduct a chi-square test of independence and interpret the conclusion in context.

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Directions

WARNING: The directions for Unit Projects differ from the directions for homework and lab assignments.

Use the drop-down menu to learn about the four steps needed to complete this assignment.

Four steps to complete the assignment

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Data

From this point forward, all links in this assignment open in a new tab.

• Login and open StatCrunch (directions).
• Open your IAT sample data set in StatCrunch (directions).

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Questions to be Investigated and Variable Descriptions

Gender-Career IAT Questions & Variable Descriptions

Open for the Gender-Career questions

Gender-Science IAT Questions & Variable Descriptions

Open for the Gender-Science questions

Race IAT Questions & Variable Descriptions

Open for the Race questions

Sexuality IAT Questions & Variable Descriptions

Open for the Sexuality questions

Weapons IAT Questions & Variable Descriptions

Open for the Weapons questions

Weight IAT Questions & Variable Descriptions

Open for the Weight questions

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Prompt

Work through each of the following items to determine whether the categorical variables in your chosen question are related.

1. Which question are you investigating? Copy and paste the question into your response.
2. What is the explanatory variable, and what is the response variable?
3. State your hypotheses in context (the variables should be clear in each hypothesis).
4. Use StatCrunch to find the observed counts, row percentages, and expected counts. Select the explanatory variable as the row variable and the response variable as the column variable. (directions - opens in a new tab).
   • Copy and paste the contents of the StatCrunch output window into your response (copy everything – even the chi-square table).
   • Complete the following tasks to make your table more meaningful to the reader.
     • Provide a descriptive title above your table. Replace each numeric row label with the appropriate descriptive word(s).
     • Replace each numeric column label with the appropriate descriptive word(s).
     • Add any other information that will make the table more meaningful to the reader.
5. Interpret the expected counts for each response in the 3rd column of your table. No need to show how the expected counts were calculated, but each interpretation should include a relevant percentage.
6. Determine whether conditions are met to use the chi-square test of independence. For each condition explain why the condition is met or not met.
7. Chi-square test of independence:
   • If conditions are met, use the StatCrunch chi-square output (included with your contingency table above) to state your conclusion in context.
   • If conditions are not met, select a different question where conditions are met, and start over. Delete your original work, and repeat all steps above.
   • If conditions are not met for every question listed above with your IAT data set, contact me.

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