MEASURES OF SIMPLE CORRELATION<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
<ul><li>A scatter plot is a graph of the ordered pairs (x,y) of numbers consisting of the independent variables, x, and th...
Please use excel to create a scatter plot.</li></li></ul><li>
Temperature (F)<br />Water Consumption (ounces)<br />75<br />16<br />83<br />20<br />85  <br />25<br />85<br />27<br />92<...
Temperature (F)<br />Water Consumption (ounces)<br />75<br />16<br />83<br />20<br />85  <br />25<br />85<br />27<br />92<...
PEARSON PRODUCT MOMENT CORRELATION COEFFICIENT(R) <br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate S...
r= {(6*47634)-(345*819)}/{[(6*20399)-3452][(6*112443)-8192]}0.5.<br />r= 0.897.<br />The correlation coefficient suggests ...
SPEARMAN RANK-ORDER CORREALATION COEFFICIENT<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School ...
OTHER MEASURES OF RELATIONSHIP<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
CORRELATIONAL STUDIES<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
A correlation tells you that a relationship exists between 2 variables (aside from the 3rd variable problem), but tell you...
When variable A actually causes the change in B.<br />
Variables A and B really do NOT have anything to do with each other but happen to go up or down simultaneously.<br />
Variable A is correlated with variable B but there is a third factor C (the common underlying cause) that causes the chang...
PROBLEM SETS<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
Pa 298 measures of correlation
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Pa 298 measures of correlation

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Pa 298 measures of correlation

  1. 1. MEASURES OF SIMPLE CORRELATION<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
  2. 2.
  3. 3.
  4. 4.
  5. 5.
  6. 6. <ul><li>A scatter plot is a graph of the ordered pairs (x,y) of numbers consisting of the independent variables, x, and the dependent variables, y.
  7. 7. Please use excel to create a scatter plot.</li></li></ul><li>
  8. 8.
  9. 9.
  10. 10. Temperature (F)<br />Water Consumption (ounces)<br />75<br />16<br />83<br />20<br />85  <br />25<br />85<br />27<br />92<br />32<br />97<br />48<br />99<br />48<br /> For seven random summer days, a person recorded the temperature and their water consumption, during a three-hour period spent outside.  <br />
  11. 11. Temperature (F)<br />Water Consumption (ounces)<br />75<br />16<br />83<br />20<br />85  <br />25<br />85<br />27<br />92<br />32<br />97<br />48<br />99<br />48<br /> For seven random summer days, a person recorded the temperature and their water consumption, during a three-hour period spent outside.  <br />
  12. 12. PEARSON PRODUCT MOMENT CORRELATION COEFFICIENT(R) <br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
  13. 13.
  14. 14.
  15. 15. r= {(6*47634)-(345*819)}/{[(6*20399)-3452][(6*112443)-8192]}0.5.<br />r= 0.897.<br />The correlation coefficient suggests a strong positive relationship between age and blood pressure.<br />
  16. 16. SPEARMAN RANK-ORDER CORREALATION COEFFICIENT<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
  17. 17.
  18. 18.
  19. 19. OTHER MEASURES OF RELATIONSHIP<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
  20. 20.
  21. 21.
  22. 22.
  23. 23.
  24. 24.
  25. 25.
  26. 26. CORRELATIONAL STUDIES<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
  27. 27. A correlation tells you that a relationship exists between 2 variables (aside from the 3rd variable problem), but tell you absolutely nothing about cause and effect.<br />
  28. 28. When variable A actually causes the change in B.<br />
  29. 29. Variables A and B really do NOT have anything to do with each other but happen to go up or down simultaneously.<br />
  30. 30. Variable A is correlated with variable B but there is a third factor C (the common underlying cause) that causes the changes in both A and B.<br />
  31. 31. PROBLEM SETS<br />Prepared by:<br />Dr. Maria Theresa P. Pelones, DM<br />Graduate School Faculty <br />
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