Lesson pack
Inference pack
An inference unit needs a z, a coverage tally, the error trade-off, and a p-value. These four widgets cover that on one page.
Copy each snippet onto one class page. The front door is widgets. Host steps: Google Sites. Classroom notes: teachers.
Z-score calculator
A z-score calculator converts a raw value, mean, and SD into z = (x - mu) / sigma, then into a percentile. For 82, 70, 8 you get z = 1.5 and 93.32%.
CI coverage simulator
Draw hundreds of samples, build a confidence interval from each, and count how many actually capture the true parameter. What 95 percent confidence means, as a tally rather than a sentence.
Type I, Type II, and power
Slide the true parameter, the sample size, and alpha, and watch the two error regions trade off against each other. Power is the area you are trying to grow, and it is drawn.
P-value calculator
Convert a z, t, or chi-square test statistic to a p-value: one- or two-tailed for z and t, right tail for chi-square, with worked examples.