Statistics Describing Data-Correlation Study Material (Page 5 of 17)

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Point Biserial Correlation and Its Applications

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Introduction

A mother wonders whether complimenting a child՚s dancing will help them do better in future performances. This would lead to: Performance will increase in response to positive feedback, indicating a favorable relationship. There would be no difference in performance and no indication of any modification. Performance might deteriorate: a sign of a bad relationship Two continuous variables has a linear relationship, which is measured by the Pearson՚s product moment correlation coefficient. The information…

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Spearman Rank Order Correlation

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Introduction

A researcher is constantly interested in learning the strength of the relationship between relevant variables. Pearson՚s product moment correlation is the most common method of correlation; however, it requires that the data meet the criteria of parametric statistics. Data with continuous variables or underlying continuity along a numerical scale are always present. There are non-parametric methods of correlation that can be used with data that might not otherwise be suitable. No presumptions are made regarding the population from which the samples were taken. Spearman՚s …

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