Solution 34734: Explaining the ERR:STAT Message on a TI-84 Plus C Silver Edition.
What causes an ERR:STAT message to be displayed when performing statistical calculations on a TI-84 Plus C Silver Edition?
An ERR:STAT message is displayed when attempting a stat calculation or operation with lists that are not appropriate.
Make sure you follow the rules stated below to avoid an
1) Statistical analysis must have at least two data points.
2) Med-Med must have at last three points for each partition.
3) When using a frequency list, its elements must be greater than or equal to 0.
4) (Xmax - Xmin) / Xscl must be less than or equal to 47 for a histogram.
Please see the TI-84 Plus C Silver Edition guidebook for additional information.