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STA 402/502 Homework 2
M:\baileraj\Classes\Fall 2007\sta402\hw\Homework-02-31aug07doc
Assigned: 05 Sep. 2007
Due: 12 Sep. 2007
1. Read the backache data from
http://lib.stat.cmu.edu/datasets/backache
into SAS. This data set is also given at the bottom of this page.
Note that the order of the variables in the data set is:
Patient's number
Back pain severity
(values: 0=NILL; 1="nothing worth troubling about";
2="troublesome but not severe"; 3="severe")
Month when pregnancy pain started
Age of patient (years)
Height (m)
Weight (kg) at start of pregnancy
Weight (kg) at end of pregnancy
Weight (kg) of baby
Number of previous pregnancies
Backache with previous pregnancy
(values: 1=not applicable; 2=NO; 3=YES; 4=SEVERE)
Factors relieving backache (8 separate variables with 0=NO; 1=YES)
1 tablets (e.g. aspirin)
2. hot water bottle
3. hot bath
4. Cushion behind back in chair
5. Standing
6. Sitting
7. Lying
8. Walking
Factors aggravating pain (15 separate variables with 0=NO; 1=YES)
1 Fatigue
2. Bending
3. Lifting
4. Making Beds
5. Washing up
6. Ironing
7. A bowel action
8. Intercourse
9. Coughing
10. Sneezing
11. Turning in bed
12. Standing
13. Sitting
14. Lying
15. Walking.
