I have some data to which I've applied the function normplot to see whether or not the distribution is normal. How can I have output the probabilities of the line and data in the normplot ?
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If you turn on the data cursor in the figure and then click on a point, these values are shown for that point.
If you want to reproduce the calculations, here's one way to do it. This "pop" variable is already sorted; you would need to sort your data to reproduce this.
load census normplot(pop) n = length(pop); p = ((1:n)'-.5)/n; popn = mean(pop) + std(pop) * norminv(p); dataset(p,pop,popn)