When the drop-down menu appears, select “Q-Q Plot” The Q-Q Plot dialog box appears; Select the cell-range for the input data Note: The table output range is set to the selected empty cell in your worksheet. Next, select the number of quantiles (number of points in the Q-Q Plot). The number of bins is set initially to 10. Click OK. Mar 23, 2011 · The utility of normal Q-Q plots goes well beyond this informal hypothesis test, however, which is the main point of this post. In particular, the shape of a normal Q-Q plot can be extremely useful in highlighting distributional asymmetry, heavy tails, outliers, multi-modality, or other data anomalies.
To make a QQ plot this way, R has the special qqnorm () function. As the name implies, this function plots your sample against a normal distribution. You simply give the sample you want to plot as a first argument and add any graphical parameters you like. Find the latest Walmart Inc. (WMT) stock quote, history, news and other vital information to help you with your stock trading and investing.