Asked by Lance Watkins on Jun 24, 2024
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The normal probability plot is a graph that plots the residuals against the expected value of that residual if it had come from a normal distribution. When the residuals are normally distributed or approximately so, the plot should appear as a straight line, sloping upward at a 45° angle.
Normal Probability Plot
A graphical technique for assessing whether or not a data set is approximately normally distributed, utilizing a plot of sorted values versus their expected values under normality.
Residuals
Differences between observed and predicted values of data in statistical models, indicating the error in predictions.
Normally Distributed
A statistical distribution depicting data that is evenly spread out across the mean, showing the predictable variability of values.
- Perceive the importance of residuals in the confirmation process of regression models.
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Learning Objectives
- Perceive the importance of residuals in the confirmation process of regression models.
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