This is often the highlight of Volume 7. The Binomial Distribution is used when there are exactly two outcomes (success or failure). The DVD breaks down the Binomial Formula into digestible parts, showing students how to calculate the probability of "k" successes in "n" trials without feeling overwhelmed by the notation. 3. Mean and Variance of Random Variables
If you have a test on Chapters 8 or 9 of your stats textbook in the next two weeks, buy or download Volume 7 tonight. It is the closest thing to a private tutor for proportions you will find.
(Loses points only for production polish; gains everything back in instructional effectiveness.)
| Test | Use | Test Stat | df | |------|-----|-----------|----| | 1 proportion | Compare p to p₀ | z | — | | 2 proportions | Compare p₁ to p₂ | z | — | | Goodness-of-fit | Fit of 1 variable | χ² | k−1 | | Independence | 2 categorical variables | χ² | (r−1)(c−1) | | Homogeneity | Same distribution across populations | χ² | (r−1)(c−1) |