Identifying Risks and Hazardsâ€”Part 1
Instructions
For this Assignment, review this weekâ€™s Learning Resources. Open SPSS and then use the file/open/data command to open the dataset asbestos.sav. This is data collected on the incidence of lung cancer for those exposed to asbestos and those not exposed.
Run a chi-square for independence and odds ratio analysis as per this Weekâ€™s demonstration video. Then, provide your response to all items in this worksheet.
Note: You will use the SPSS Output generated in this Assignment 1 to complete Assignment 2 as well.
Step 1: Set up your hypothesis and determine the level of significance
1. State the alternative/research hypothesis in written format.
2. State the null hypothesis in written format
3.What is your level of significance (choose Î± = .05 or Î± = .01)?
Step 2: Select the appropriate test statistic
4.What is the appropriate test statistic?
Step 3: Set up the decision rule
5. Based on the level of significance you set in step 1, what is your decision rule?
Note: Because there are 2 rows and 2 columns, the total degrees of freedom is 1.
Step 4: Compute the test statistic
Open SPSS and then use the file/open/data command to open the dataset asbestos.sav.
Select: Analyze > Descriptive Statistics > Crosstabs
Move asbestos to the Row(s) box, and lungca to the Column(s) box. Click on Statistics and make sure Chi-Square and RISK are checked. Click on Cells, and check Observed and Expected (frequencies). Click Continue; click OK.
6. What is the X2 value computed by your SPSS analysis?
7. Paste your SPSS output here:
Step 5: Conclusion
8. Do you reject or fail to reject the null hypothesis?
9. Is there an association between asbestos exposure and lung cancer?
Part 2
1. From the SPSS output generated in this weekâ€™s Assignment 1, copy only your odds ratio analysis (â€œRisk Estimateâ€) portion of the output and paste, below:
2. The p-value associated with a chi-square test only suggests whether or not the results are statistically significant. Why is it important to also look at the odds ratio?
3. What does the odds ratio value in the SPSS output tell you, specifically, about lung cancer and exposure to asbestos?
4. Based on your answer above, would you say there is a strong association between asbestos exposure and lung cancer?
5. From the SPSS output generated in this weekâ€™s Assignment 1, copy only your â€œasbestos * lung cancer Crosstabulationâ€ portion of the output and paste, below:
6. Using the formula provided in this weekâ€™s Learning Resources, and the data in the cross-tabulation output, calculate the odds ratio and show your work in your answer, below.

Identifying Risks and Hazardsâ€”Part 1 Instructions For this Assi...