American InterContinental University Correlation and Regression Summary
Description
Please read the scenario below, and then answer the questions that follow in a 3-page summary. The questions will guide your analysis of the situation, but they need to be presented as part of a summary on hypothesis testing, with 2 samples.
The chart is used to visually present relationships between what variables?
A correlation analysis measures the strength of what variables?
- A correlation analysis is concerned with the strength of the relationship between what variables?
- If the plotted intersections between variables are tight, what does that indicate about the relationship between the variables?
- If the plotted intersections between variables are in a flat, horizontal line, what does that mean about the relationship between variables?
- The sample correlation coefficient r is used to measure what aspect of the linear relationship?
- What range does the sample correlation between coefficient r ranges indicate?
- For a perfectly negative relationship (for every one unit increase in x, you have one unit of decrease in y), what is the sample correlation coefficient r equal to?
Scenario:
Watch the following video, and then answer the questions above (Wiseman, 2014):
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