Correlations

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  • Created by: myah
  • Created on: 29-12-12 17:35
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  • Correlations
    • A correlation is an investigation into the relationship between two variables. They focus only on the relationship between these variables and can be used as a starting point before experimental investigations.
      • Advantages of correlations:
        • Correlation allows the researcher to investigate naturally occurring variables that maybe unethical or impractical to test experimentally.
        • Correlation allows the researcher to clearly and easily see if there is a relationship between variables this can then be displayed in a graphical form.
      • Disadvantages of correlations
        • Correlation is not and cannot be taken to imply conclusion. Even if there is a strong association between two variables, we cannot assume that one causes the other.
        • Correlation does not allow us to go beyond the data that is given.
    • A positive correlation is as one variable increases the other variable increases although not necessarily at the same rate.
    • A negative correlation is as one variable increases the other variable decreases although not necessarily at the same rate.
    • Hypothesis for correlations
      • One tailed hypothesis:·         There will be a significant positive/negative correlation...
      • Two tailed/alternate hypothesis: There will be a significant correlation...
      • Null hypothesis: there will be no correlation ...

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