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7. Statistics - Correlations
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- 1Correlations - the ________ of a ________ between two or more variables.measure
relationship - 2What does Positive Correlation mean?When the value of one item increases, then the value of the other item is likely to increase.
- 3What's an example of a positive correlation?The relationship between height and weight.
*Not strong because there are plenty of short people who weigh as much or more than tall people. - 4What's an example of a strong positive correlation?The relationship between an increase in wealth and an increase in spending.
- 5What does Negative Correlation mean?An inverse relationship - when one event increases, the other decreases.
- 6What's an example of a negative correlation?A student who has many absences has a decrease in grades.
- 7Correlation does not always equal ________.causation
- 8A statistic that indicates the degree of linear relationship between two variables.Pearson Product-Moment Correlation Coefficient
- 9Pearson Product-Moment Correlation Coefficient: Ranges in value from ________ to ________.+1.0 to -1.0
- 10Pearson Product-Moment Correlation Coefficient: +1.0 indicates...a perfect direct linear relationship.
- 11Pearson Product-Moment Correlation Coefficient: +1.0 means that when the value of something increases...the value of the other item increases.
- 12Pearson Product-Moment Correlation Coefficient: -1.0 indicates...a perfect inverse relationship.
- 13Pearson Product-Moment Correlation Coefficient: -1.0 means that when something trends upward...the other event is likely to trend downward.
- 14A graph that shows to what degree two variables correlate.Scatter Plots
- 15A graph of a correlation.Scatter Plots
- 16Scatter Plots: Each variable is plotted on...an x- and y-axis.
- 17Scatter Plots: Each individual score or measurement is plotted as a single point at the junction where...the two variables meet.
- 18Scatter Plots: When plotted, if the scores trend in a pattern from lower left to upper right, then...the correlation is positive.
- 19Scatter Plots: When plotted, if the scores trend from the upper left to the lower right, then...the correlation is negative.
- 20Scatter Plots: When plotted, if the scores appear in a random or circular fashion, then...the correlation is neither positive nor negative.
- 21Scatter Plots: A perfectly random or circular array of scores would have a ________ Pearson coefficient, which means...zero
the two items do not correlate well. - 22Scatter Plots: With a ________ ________, there is no ability to predict results.zero coefficient
- 23What is the benefit of a scatter plot?The correlation is easily identified by the shape created by the plotted points.
- 24Scatter plots indicate the degree of strength of a correlation by...how close the numbers fall in line.
- 25Scatter Plots: As plotted points come closer to falling in a perfectly straight line, they also come closer to a perfect +1.0 or -1.0 ________ _________ and have greater ________ ________.Pearson coefficient
predictive value
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- Fichas sobre 7. Statistics - Correlations, creado por Patrick Bodenhausen el 03/10/2019.
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- Patrick Bodenhausen
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