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Questions and Answers
What is a scatter plot?
What is a scatter plot?
- A plot that displays the relationship between two sets of numerical data (correct)
- A plot showing a single set of data
- A type of bar graph
- A line graph showing trends over time
What does a trend line indicate in a scatter plot?
What does a trend line indicate in a scatter plot?
The correlation or association between two sets of data.
What is correlation in data analysis?
What is correlation in data analysis?
Association between two sets of data.
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Study Notes
Scatter Plots and Trend Lines
- A scatter plot is utilized to visualize relationships between two numerical data sets.
- The scatter plot can indicate trends, clustering, or outliers within the data.
- Each point on the scatter plot represents a pair of values from the two data sets.
Trend Lines
- A trend line is a graphical representation added to a scatter plot to highlight correlation.
- It helps to summarize the data and make predictions based on the visualized trend.
- The slope of the trend line indicates the direction and strength of the relationship.
Correlation
- Correlation defines the degree to which two variables are associated or related.
- Positive correlation implies that as one variable increases, the other does too, while negative correlation indicates an inverse relationship.
- Correlation does not imply causation; it only indicates that a relationship exists between the data sets.
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