What is invalid dimension on the ti-83 plus error message?

Answer 1

An "invalid dimension" error means that either you tried to store a value to a spot i n a list or array that doesn't exists, or that the lists in a stat plot don't have the same number of entries.

If you're just trying to graph something, press Y= and deselect the plots at the top.

If you're trying to use a stat plot, check to make sure that the lists used in the plot have the same number of entries

You'll aslo get an invalid dimension error if you try to store a number to position 8 in a list with only 4 values, for example, since the list has no position 8.