Math Tutor Dvd Statistics Vol 7

"Honestly, this is better than my professor's entire semester. The P-value lesson is worth the price of the DVD alone." –

Taught by Jason Gibson, a former NASA flight controller, who emphasizes "learning by doing" through fully worked problems. math tutor dvd statistics vol 7

A biologist measures the mercury levels in 12 fish from a lake. The sample mean is 0.55 ppm, and the sample standard deviation is 0.12 ppm. Find the 95% confidence interval for the mean mercury level of all fish in the lake. "Honestly, this is better than my professor's entire

| 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) | The sample mean is 0

: Lessons cover solving right-tail and left-tail tests to compare the spread of two different data sets.

Practical lessons on comparing the variances of two different populations.