The TI-89 graphing calculator is a powerful calculator that can help you calculate everything you need in elementary statistics with ease. Instead of adding lists of numbers and trying to remember formulas, the TI-89 does the work for you and keeps the formulas in its memory. While it’s important to know the basics (for example, what a mean is and how it’s calculated), it isn’t necessary (or fun!) to do the same types of calculations over and over again. One way the TI-89 can help you is by quickly finding the mean of a set of numbers.
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