TI-84 Guides
Step-by-step guides for AP Statistics, IB Math, and common TI-84 Plus CE errors.
Error Fixes
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TI-84 Not Showing Graph — How to Fix
Covers all 7 reasons the graph screen is blank.
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TI-84 Stuck on Validating OS — Fix
Break out of the firmware verification loop.
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TI Connect CE Not Recognizing Calculator
Fix the "No calculator detected" error.
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TI-84 Showing Decimals Instead of Fractions
3 ways to get exact fractions on TI-84.
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TI-84 Error Messages Explained
ERR:SYNTAX, ERR:DOMAIN and more — explained.
AP Statistics
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normalcdf & invNorm on TI-84 — Complete AP Statistics Guide
Learn how to use normalcdf and invNorm on the TI-84 Plus CE for AP Statistics. Includes syntax, examples, common mistakes, and AP exam writing tips.
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Hypothesis Testing on TI-84 — Z-test, T-test & Proportion Test
Step-by-step guide to running hypothesis tests on the TI-84 Plus CE. Covers 1-PropZTest, Z-Test, T-Test, and how to interpret p-values for AP Statistics.
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Linear Regression (LinReg) on TI-84 — AP Statistics Guide
How to calculate LinReg(ax+b) on the TI-84 Plus CE. Includes entering data in lists, running regression, interpreting r and r², and AP exam format.
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Confidence Intervals on TI-84 — ZInterval, TInterval & More
Calculate confidence intervals on the TI-84 Plus CE. Covers ZInterval, TInterval, 1-PropZInt with worked examples in AP Statistics format.
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binompdf & binomcdf on TI-84 — Binomial Probability Guide
How to use binompdf and binomcdf on the TI-84 Plus CE for binomial probability. Exactly-k vs at-most-k problems, syntax, worked examples, and AP exam format.
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Standard Deviation on TI-84 — 1-Var Stats Guide
How to calculate standard deviation on the TI-84 Plus CE with 1-Var Stats. Entering data in lists, reading Sx vs σx, and which one to use on AP Statistics.