1)What are the features of a scattergram? 2) What is a correlation coefficient and what it...

1)What are the features of a scattergram?
2) What is a correlation coefficient and what it measures?
3) What can its values be? And what do those values mean as far as weak and strong, negative and positive, and none.
4) Given these four images (a), (b), (c), (d) make a prediction about what you think the correlation coefficient might be and justify why.

Expert Solution

orchestra answered 2 years ago

1.What is a correlation?2. What is a scattergram? What is on the horizontal axis? The...

1.What is a correlation?2. What is a scattergram? What is on the horizontal axis? The vertical axis? When is there an association between variables (based on a visual examination of the scattergram)? What does a scatterplot look like when there is a perfect association? What if there is no relationship? What about a positive vs. negative relationship? What information do scatterplots give us about a relationship? What do they not tell us?

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a. Describe what the Pearson correlation coefficient is and what the coefficient of determination is. compare...

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Calculate the correlation coefficient for the following data: X=0, -1, -2, -3, -2, -2, 0, 1,...

Calculate the correlation coefficient for the following data: X=0, -1, -2, -3, -2, -2, 0, 1, 2, 3, 2, 1 Y=3, 2, 1, 0, -1, -2, -3, -2, -1, 0, 1, 2 Find through Excel.

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