Normal probability plots provide a way to test the assumption that the normal distribution is a close approximation to the actual unknown distribution that supplied the data we are analyzing.

Question

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Normal probability plots are a graphical tool used to assess whether a given set of data can be assumed to be normally distributed. The plot compares the observed data to the expected distribution under normality, and if the points fall approximately along the straight line, it can be concluded that the data is normally distributed. Therefore, normal probability plots are useful for testing the normality assumption in statistical analysis.

Normal Probability Plots Provide a Way to Test the Assumption