E-CodeStatistics on a TI-84: how-to guides
13 guides for statistics on the TI-84 Plus CE, TI-84 Plus and TI-83 Plus. Each one shows the keys to press, step by step.
The guides
- Find mean and standard deviation: Press STAT, ENTER for Edit and type your numbers into L1, then 2nd QUIT.
- Find mean and standard deviation (TI-83 Plus): Press STAT, ENTER for Edit and type your numbers into L1, then 2nd QUIT.
- Show r and r² on a regression (TI-84 Plus CE): Press MODE, ▼ ten times to STAT DIAGNOSTICS, ▶ to ON and ENTER, then 2nd QUIT.
- Show r and r² on a regression (TI-84 Plus): Press MODE, ▼ twelve times to STAT DIAGNOSTICS, ▶ to ON and ENTER, then 2nd QUIT.
- Show r and r² on a regression (TI-83 Plus): Press 2nd CATALOG (above 0), x⁻¹ to jump to D, ▼ to DiagnosticOn and ENTER twice.
- Graph a line of best fit: Press STAT ▶ CALC 4 (LinReg(ax+b)), ▼ to Store RegEQ, press VARS ▶ Y-VARS, ENTER, ENTER for Y1, then ▼ to Calculate and ENTER.
- Graph a line of best fit (TI-83 Plus): Press STAT ▶ CALC 4 to paste LinReg(ax+b), then VARS ▶ Y-VARS, ENTER, ENTER to add Y1 and ENTER to run it.
- Find a normal distribution probability: Press 2nd DISTR (above VARS) and 2 for normalcdf(.
- Find a normal distribution probability (TI-83 Plus): Press 2nd DISTR (above VARS) and 2 for normalcdf(, then type lower, upper, mean and SD with commas, close the bracket and press ENTER: normalcdf(-1,1) (mean 0, SD 1 when left out) is .6827.
- Find a binomial probability: Press 2nd DISTR (above VARS), then ALPHA MATH for A: binompdf(.
- Find a binomial probability (TI-83 Plus): Press 2nd CATALOG (above 0), APPS to jump to B, ▼ to binompdf( and ENTER.
- Find a confidence interval for a mean: Press STAT, ▶ twice to TESTS and 8 for TInterval.
- Do a hypothesis test for a mean: Press STAT, ▶ twice to TESTS and 2 for T-Test.