Remember that we already learned about the standard error .... The standard error of the sample mean is given by the following equation: $$\sigma_\bar{y} = \frac{\sigma}{\sqrt{n}} $$. In the above equation, $\sigma$ is the population standard deviation. But like $\mu$, $\sigma$ is an unknown parameter.
Alicia Keys and White Stripes singer Jack White are to record the theme for new James Bond film Quantum of Solace. Jack White and Alicia Keys will collaborate on the new James Bond film theme Photo: JOHN TAYLOR/PA. By Anita Singh, Showbusiness Editor. 11:24AM BST 30 Jul 2008.
After months of speculation, Bond producers Michael G. Wilson and Barbara Broccoli, along with Billboard.com, reported on June 29, 2008, that Alicia Keys would be teaming up with Jack White (founder and lead guitarist of The White Stripes) to sing Another Way to Die: the Quantum of Solace theme song.