I meant what are you trying to do? There is not a stat button (that I know of) on the TI 89, but I can guarantee you that there is a way to do what you want to.
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The 86 has more memory. It also has some advanced calculus capabilities the 83 doesn't. However you're much more likely to see examples for the 83 in textbooks and other references.
Please Install Calculator Software Now error
This message means that the operating system has been corrupted. These steps will allow you to update the OS.
Unit to Unit
• Connect two TI-83 Plus units by means of the data cable (short black cable that was prepackaged with the TI-83 Plus)
• Make sure that at least one of the TI-83 Pluses contains the current Operating System
• Select [2nd] Link
• Select "Send OS" option from the Link menu
• Make sure that the other unit still reads "Waiting Please Install"
• The OS should be downloading.
From the Computer
• Make sure you have the latest version of the TI Connect™ Software
• Download the latest version of OS for the TI-83 Plus to the desktop of the PC.
• Connect the appropriate TI-GRAPH LINK™ cable between the PC and TI-83 Plus.
• Since the TI-83 Plus is currently off, the TI-83 Plus will automatically turn on when the TI-GRAPH LINK Cable is inserted.
• On your computer, choose Start, Programs, TI Tools, TI Connect, TI OS Downloader.
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