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At first glance, I believe it is. Though, I cannot tell you out of doubt that tick lines represent averages as I do not know everything about the graph.
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hello QuietMinotaur4647,
At first glance, I believe it is. Though, I cannot tell you out of doubt that tick lines represent averages as I do not know everything about the graph.
Hope it helps.
Let us know if you have other questions!
Emilie