Mathematical Statistics
Four coursebooks, four extra exercise books and a handbook! (click to enlarge)
M347 units were written to be browser-friendly (bonus to hard-copy and pdf versions)…
Screencasts (short lectures) pre-recorded for many key topics.
The standard bivariate normal distribution:
\[f(z,w) = \frac{1}{2\pi \sqrt{1-\rho^2}}\exp \left[-\frac{1}{2} \left(\frac{z^2-2\rho zw + w^2}{1-\rho^2}\right)\right]\]
So if the correlation \(\rho = 0\), this simplifies to: \[f(z,w) = \frac{1}{2\pi} \exp \left[-\frac{1}{2} \left({z^2 + w^2}\right)\right] \]
\[f(z,w) = \frac{1}{\sqrt{2\pi}}\exp \left[-\frac{1}{2}z^2\right]\frac{1}{\sqrt{2\pi}}\exp \left[-\frac{1}{2}w^2\right] = f(z)f(w)\]
What famous result does this help us understand?
For musicians - scales; For mathematicians - exercises!
I enjoyed M347 as an OU student, and hope you find it as intriguing and rewarding as I did!