| 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) |
Volume 7 focuses almost exclusively on the manual calculation and lookup-table method. While some might view this as outdated in the age of big data, most educators argue that students must understand the underlying mechanics of the formulas before relying on software "black boxes." Therefore, this DVD remains highly relevant as a foundational tool, ensuring that the student understands what the software is calculating when it spits out a P-value of 0.03. math tutor dvd statistics vol 7
After mastering Volume 7, move immediately to . You cannot fully understand T-distributions without the logic you learned here. | Test | Use | Test Stat |
In the age of free educational content, why pay for a DVD? The answer lies in move immediately to .
Same calculation as test of independence, but sampling method differs (separate random samples from each population).