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How to draw Scatter plot on SPSS

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How to draw Scatter plot on SPSS

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How to draw Scatter plot on SPSS

  1. 1. How to draw a Scatter Plot on SPSS http://www.palmx.org/drtamil/spss/ sga-ttest-youtube.sav
  2. 2. ©drtamil@gmail.com 2016 Factors Affecting SGA SGA (Y/N) (Birth weight) Mother’s Nutrition (BMI/Obesity) •Weight •Height Smoking Hypertension
  3. 3. ©drtamil@gmail.com 2016 Dependent Outcome  Birth weight of the babies  Small for gestational age i.e. less than 2.7kg for term babies – Y/N By Yehudamalul - Own work, CC BY-SA 3.0,
  4. 4. ©drtamil@gmail.com 2016 What command to use?  Plot a scatter plot between MOTHERS’ BODY MASS INDEX (in kg) and BIRTH WEIGHT (in kg)  MOTHERS’ BODY MASS INDEX (in kg) is considered as the risk factor so should be on x-axis.  BIRTH WEIGHT (in kg) is considered as the outcome, so should be on y-axis.  X comes before Y, as Risk Factor comes before Outcome.
  5. 5. ©drtamil@gmail.com 2016 Factors Affecting SGA Birth weight (in kg) Proxy for Mother’s Nutrition; Body Mass Index in kg/m2 Smoking (Y/N) Hypertension (Y/N)
  6. 6. How to draw a Scatter Plot on SPSS http://www.palmx.org/drtamil/spss/ sga-ttest-youtube.sav
  7. 7. ©drtamil@gmail.com 2016 y = a + bx, “a” is y-intercept.
  8. 8. ©drtamil@gmail.com 2016 y = a + bx, “b” is slope/steepness of line.
  9. 9. ©drtamil@gmail.com 2016 Conclusion  There is a positive association between mothers’ BMI and birth weight.  As the mothers’ BMI increases, the birth weight of the babies also increases.  r2 = 0.186, therefore 18.6% of the birth weight variability is contributed by mBMI.  “Big Mothers Get Big Babies!”
  10. 10. ©drtamil@gmail.com 2016 Exercise  Repeat the same scatter plot between; ◦ Mothers’ Weight and Birth Weight ◦ Mothers’ Height and Birth Weight ◦ Mothers’ Age and Birth Weight

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