Correlation and regression | Part 2, details of the procedure
This video introduces the details of the correlation and regression procedure. It provides step by step calculations for performing a correlation or regression analysis. This video describes a set of technical terms and shows how to calculate them using sample data sets. How to obtain the best-fit line through data is demonstrated. It also discusses how to interpret the results of an analysis.
A companion video describing more about the conceptual background is here:
• Correlation and regression | Part 1, intro...
The correlation method is used to test whether two variables are associated. The regression method is used to identify causation - if one of the variables causes the other. Both do this by plotting the dependent variable against the independent variable and looking for a statistically significant linear pattern.
The video defines the correlation coefficient and the coefficient of determination and shows how their values are interpreted. It also shows show confidence intervals for the line and prediction or inclusion intervals for the data are calculated.
Finally, a couple of examples are used to demonstrate how significant slopes may not be relevant and the danger of extrapolating predictions past known values for the independent variable.
This is the video that answers the questions: how do I perform a correlation or regression analysis?
StatsExamples website:
http://www.statsexamples.com/
Companion video - Correlation and regression | Part 1, introduction to concepts:
• Correlation and regression | Part 1, intro...
Statexamples ANOVA video:
• Video
========academic citations========
Cancer risk and height:
http://doi.org/10.1098/rspb.2018.1743
US mother's age at first childbirth:
https://data.nber.org/natality/2001/d...
========music, image, and video credits========
All non-original images are believed to be in the public domain, available under a CC-0 or CC-by-SA license, obtained under paid license, or used under a "fair use" interpretation. If you believe that an item you own the copyright to is here, please contact us using the email available on the "About" section of the channel.
Details of credits for this video can be found at:
http://www.statsexamples.com/credits-...
#statsexamples #correlation #regresion #statistics #statshelp #stats #examples