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10 Cards in this Set
- Front
- Back
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what is correlation?
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an association or relationship between the occurrence of two or more events
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correlation coefficient
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a number that indicate the strength of a relationship between two or more events; the closer the number is to -1.00 or +1.00, the greater is the strength of the relationship.
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a perfect positive correlation coefficient
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of +1.00 means that an increase in one event is always matched by an equal increase in a second event.
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a positive correlation coefficient
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one event tends to increase the second event tends to , but not always increase.
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a zero correlation
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indicates that there is no relationship between the occurrence of one event and the occurrence of a second event .
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a negative correlation coefficient
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indicates that as one event tends to increase the second event tends to but does not always decrease.
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a perfect negative correlation coefficient
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-1.00 means that an increase in one event is always matched by an equal decrease in a second event.
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what two purposes do correlation serve ?
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helps predict behavior and also point to where to look for possible causes as has happened in the case of lung cancer.
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does correlation identify what causes what?
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no
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correlation and prediction
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correlation shows strength of relationship and points to possible causes.
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