Correlational Research

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Correlational Research

  1. 1. Correlational Research Stella, Andrew, Vickie & Cissy Group 2 (Infocycle)
  2. 2. Research title <ul><li>Topic:- </li></ul><ul><li>Reading story books could improve the scores / grade of English in primary school </li></ul>
  3. 3. Research questions <ul><li>Do primary students read story books have high scores of English than those who have not? </li></ul><ul><li>Does longer hours spent on reading story book improve English level? </li></ul>
  4. 4. Correlational Research <ul><li>Helps us understand related events, conditions and behaviors </li></ul><ul><li>To make predictions of how one variable might predict another </li></ul><ul><ul><li>Can high English level results be used to predict the same results on Chinese subjects? </li></ul></ul>
  5. 5. Measurement <ul><li>Population </li></ul><ul><ul><li>Radom select (30 students randomly selected) </li></ul></ul><ul><li>Ordinal Scales </li></ul><ul><ul><li>English level Hours of Story books read </li></ul></ul><ul><ul><li>(Dependent variable) (Independent varibale) </li></ul></ul>
  6. 6. Correlational method <ul><li>Variable </li></ul><ul><ul><li>4 classes of P1 students </li></ul></ul><ul><li>Constant </li></ul><ul><ul><li>Three months were spent on the study of this research </li></ul></ul>
  7. 7. Probability <ul><li>Correlation coefficient is computed </li></ul><ul><ul><li>If the probability level of 0.5 that means the decision we made intends correct </li></ul></ul>
  8. 8. Data Collect <ul><li>After reading story books for about three months, a test of English was given to students </li></ul><ul><li>Collect the scores and evaluate the correlation of Independent variable and dependent variable </li></ul>
  9. 9. Ordinal Scales <ul><li>English level Time spent on reading </li></ul><ul><li>story books (hours) </li></ul><ul><li>A+ 360 </li></ul><ul><li>A 300 </li></ul><ul><li>A- 200 </li></ul><ul><li>B+ 150 </li></ul><ul><li>B 120 </li></ul><ul><li>B- 100 </li></ul>
  10. 10. Ordinal Scales <ul><li>English level Time spent on reading </li></ul><ul><li>story books (hours) </li></ul><ul><li>C+ 80 </li></ul><ul><li>C 70 </li></ul><ul><li>C- 65 </li></ul><ul><li>D 60 </li></ul><ul><li>E 50 </li></ul><ul><li>F <50 </li></ul>
  11. 11. Ordinal data <ul><li>A+ (95-100) </li></ul><ul><li>A (90-94) </li></ul><ul><li>A- (85-89) </li></ul><ul><li>B+ (80-84) </li></ul><ul><li>B (75-79) </li></ul><ul><li>B- (70-74) </li></ul><ul><li>C+ (65-69) </li></ul><ul><li>C (60-64) </li></ul><ul><li>C- (55-59) </li></ul><ul><li>D (50-54) </li></ul><ul><li>E (45-49) </li></ul><ul><li>F ( 0-44) </li></ul>
  12. 12. Types of Measurement Scales <ul><li>Mode is appropriate for nominal data </li></ul><ul><li>Median is for ordinal data </li></ul><ul><li>Mean is for interval or ratio data </li></ul>
  13. 13. Data analysis Median = 80 hrs
  14. 14. Measure of Central tendency <ul><li>Average of hours spent on reading story books correlate to high marks of English subject </li></ul><ul><ul><li>Median = 80 hours spent on reading story </li></ul></ul><ul><ul><li>books </li></ul></ul>
  15. 15. Scatter Graph
  16. 16. Scatter graph r = 0.81843
  17. 17. Correlation coefficient calculate
  18. 18. Correlation coefficient calculate r = 0.81843
  19. 19. Correlation Co-efficient Formula : <ul><ul><li>Raw score formula is used </li></ul></ul><ul><ul><li>Correlation(r) = NΣXY - (ΣX)(ΣY) / Sqrt([NΣX2 - (ΣX)2][NΣY2 - (ΣY)2]) </li></ul></ul><ul><ul><li>In this experiment </li></ul></ul><ul><ul><li>- Correlation(r) = 0.81843 </li></ul></ul>
  20. 20. Pearson Correlation coefficient <ul><ul><li>Correlation(r) = +0.81843 </li></ul></ul><ul><li>It is very strong for individual predictions </li></ul><ul><li>It is also adequate for group predictions </li></ul>
  21. 21. Conclusions <ul><li>Since the correlation coefficient is </li></ul><ul><li>r = 0.81843 (nearer to +1), so strong relation ( positive ) is predicted </li></ul><ul><li>Students spent more hours on reading story books can have higher scores. It is predicted that it could implement on Chinese subjects </li></ul>
  22. 22. References:- <ul><li>&quot;Correlation Co-efficient Calculator &quot;, from http:// www.easycalculation.com/statistics/correlation.php . </li></ul><ul><li>Churchill, D. (2008). &quot;Basic statistics and correlational research.&quot; Seminar 4. </li></ul><ul><li>Cohen, L. and L. Manion (1980). Research methods in education . London, Croom Helm. </li></ul><ul><li>Gay, L. R. (1981). Educational research : competencies for analysis & application . Columbus, Merrill. </li></ul><ul><li>Vockell, E. L. and J. W. Asher (1995). Educational research . Englewood Cliffs, New Jersey, Merrill. </li></ul>

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