# Why is this normal probability plot graph skewed right?

First, I apologize for the bad image, but it's the best I can do with a mouse. Anyways, here it is:

So the data is skewed right, but the normal probability plot bends up and over what would be the approximate linear equation. According to different websites1, 2, a normal probability plot with data skewed right goes under the approximate line of best fit, and my graph looks more like it's skewed left. What am I misunderstanding?

1: itl.nist.gov/div898/handbook/eda/section3/normprp4.htm
2: www.basic.northwestern.edu/statguidefiles/probplots.html#Data%20Skewed%20to%20Right

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The graph is impossible to understand without labels and scales for the axes. –  whuber Oct 5 '11 at 3:13
It's a normal probability plot from -3 to 3 on the y-axis and time on the x axis. –  Anonymous Oct 5 '11 at 3:14
Assuming time increases left to right and y increases bottom to top and that the normal plotting positions have been correctly computed, this is a plot of right-skewed times. Why does it look skewed left to you? –  whuber Oct 5 '11 at 3:18
The websites show that right skewed graphs don't look like that, while it looks like the examples for left skewed graphs. –  Anonymous Oct 5 '11 at 3:21
Is that a frequency histogram at the top? If you best want to understand your question, try making the normal probability plot yourself, without a computer. –  Adam Oct 5 '11 at 3:55