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Statistics Scatter Diagram

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11. Make up a scatter diagram with 10 dots for each of the following situations:
(a) perfect positive linear correlation,
(b) large but not perfect positive linear correlation,
(c) small positive linear correlation,
(d) large but not perfect negative linear correlation,
(e) no correlation,
(f) clear curvilinear correlation.

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Solution Summary

The expert makes up a scatter diagram with 10 dots for each is determined.

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With correlation, it's all about two things: how well the points line up along a line (this tells you the strength of the correlation) and what direction they're pointing (up to the right - positive, or down to the right - negative). The more dispersion or spread we see in a scatterplot, the weaker the correlation is.

A perfect positive correlation (above) will have all of the points lined up perfectly on a line, pointing upwards to the right. This indicates that as scores on the X variable increase, scores on the Y variable increase in a perfectly predictable way.

A strong positive correlation (above) ...

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