E-CodeHypothesis tests: z, t, two-sample t, chi-square — a TI-84 Plus CE program
HYPTEST is a TI-BASIC program for the TI-84 Plus CE. One-sample z and t tests, the two-sample (Welch) t test and the chi-square goodness-of-fit test from summary numbers: test statistic, degrees of freedom, p-value for the chosen tail, and the reject / do-not-reject decision at your alpha.
What it asks for and what it shows
It asks for 5 values at its prompts, after you pick options 1, 1 from its menu. In the example below it shows STAT, P, DO NOT REJECT H0.
Example run
One of its oracle test cases: “z: mean 102.5 vs 100, sigma 10, n 36, two-sided”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Menu | option 1 |
| Menu | option 1 |
| Input 1 | 100 |
| Input 2 | 10 |
| Input 3 | 102.5 |
| Input 4 | 36 |
| Input 5 | 0.05 |
| The screen shows | |
STAT= | 1.5 |
P= | 0.1336144025 |
| Text | DO NOT REJECT H0 |
How it's checked
17 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 91 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Hypothesis tests: z, t, two-sample t, chi-square” (HYPTEST).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
Related programs
- Confidence intervals: z, t, proportion, two-sample
- Chi-square test of independence
- Regression: linear, quadratic, exponential with r²
- Binomial, Poisson and normal probabilities
- One-way ANOVA
All TI-84 Plus CE statistics programs · All TI-84 Plus CE programs