Instructions For this Assignment, review this week’s Learning Resources. Open SP
ID: 3233481 • Letter: I
Question
Instructions
For this Assignment, review this week’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 Week’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.
Submit this Application Assignment by Day 7.
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Note: Scores are to be entered by instructor
Step 1: Set up your hypothesis and determine the level of significance
State the alternative/research hypothesis in written format.
Answer: ____ / 6 points
State the null hypothesis in written format
Answer: ____ / 6 points
What is your level of significance (choose = .05 or = .01)?
Answer: ____ / 4 points
Step 2: Select the appropriate test statistic
What is the appropriate test statistic?
Answer: ____ / 4 points
Data below:
Smoke asbestoca lungca
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-Continued below-
Step 3: Set up the decision rule
Based on the level of significance you set in step 1 and test statistic in step 4, what is your decision rule?
Note: Because there are 2 rows and 2 columns, the total degrees of freedom is 1.
Answer: ____ / 6 points
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.
What is the 2 value computed by your SPSS analysis?
Answer: ____ / 4 points
Paste your SPSS output here:
Answer: ____ / 20 points
Step 5: Conclusion
8. Do you reject or fail to reject the null hypothesis?
Answer: ____ / 6 points
Is there an association between asbestos exposure and lung cancer?
Answer:
Explanation / Answer
Result:
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 Week’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
Answer: ____ / 6 points
Step 1: Set up your hypothesis and determine the level of significance
State the alternative/research hypothesis in written format.
Answer: ____ / 6 points
Ha: There is association between asbestos exposure and lung cancer.
State the null hypothesis in written format
Answer: H0: There is no association between asbestos exposure and lung cancer.
____ / 6 points
What is your level of significance (choose = .05 or = .01)?
Answer: 0.05 ____ / 4 points
Step 2: Select the appropriate test statistic
What is the appropriate test statistic? Chi square test
Step 3: Set up the decision rule
Based on the level of significance you set in step 1 and test statistic in step 4, 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.
What is the 2 value computed by your SPSS analysis?
Answer: 86.718 ____ / 4 points
Paste your SPSS output here:
Answer: ____ / 20 points
Chi-Square Tests
Value
df
Asymptotic Significance (2-sided)
Exact Sig. (2-sided)
Exact Sig. (1-sided)
Pearson Chi-Square
86.718a
1
.000
Continuity Correctionb
84.372
1
.000
Likelihood Ratio
90.348
1
.000
Fisher's Exact Test
.000
.000
N of Valid Cases
280
a. 0 cells (0.0%) have expected count less than 5. The minimum expected count is 41.30.
b. Computed only for a 2x2 table
Step 5: Conclusion
8. Do you reject or fail to reject the null hypothesis?
Answer: Reject the null hypothesis ____ / 6 points
Is there an association between asbestos exposure and lung cancer?
Answer: yes, there is an association between asbestos exposure and lung cancer
Your answer
asbestos * Lung cancer Crosstabulation
Lung cancer
Total
No
Ye
asbestos
No
Count
142
20
162
Expected Count
105.3
56.7
162.0
Yes
Count
40
78
118
Expected Count
76.7
41.3
118.0
Total
Count
182
98
280
Expected Count
182.0
98.0
280.0
Chi-Square Tests
Value
df
Asymptotic Significance (2-sided)
Exact Sig. (2-sided)
Exact Sig. (1-sided)
Pearson Chi-Square
86.718a
1
.000
Continuity Correctionb
84.372
1
.000
Likelihood Ratio
90.348
1
.000
Fisher's Exact Test
.000
.000
N of Valid Cases
280
a. 0 cells (0.0%) have expected count less than 5. The minimum expected count is 41.30.
b. Computed only for a 2x2 table
Risk Estimate
Value
95% Confidence Interval
Lower
Upper
Odds Ratio for asbestos ( No / Yes)
13.845
7.571
25.320
For cohort Lung cancer = No
2.586
1.997
3.349
For cohort Lung cancer = Ye
.187
.121
.287
N of Valid Cases
280
Chi-Square Tests
Value
df
Asymptotic Significance (2-sided)
Exact Sig. (2-sided)
Exact Sig. (1-sided)
Pearson Chi-Square
86.718a
1
.000
Continuity Correctionb
84.372
1
.000
Likelihood Ratio
90.348
1
.000
Fisher's Exact Test
.000
.000
N of Valid Cases
280
a. 0 cells (0.0%) have expected count less than 5. The minimum expected count is 41.30.
b. Computed only for a 2x2 table