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Examine the probability plot and assess how closely the data points follow the fitted distribution line. If the specified theoretical distribution is a good fit, the points fall closely along the straight line. For example, the points in the following normal probability plot follow the line well. The normal distribution appears to be a good fit to the data.
Hold the pointer over the fitted distribution line to see a chart of percentiles and values.
For example, the following probability plot shows the pulse rates of test subjects as they walked on a treadmill. For a normal distribution with a mean and standard deviation equal to the data, you would expect 5% of the population to have a pulse rate of 54.76 or less.