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.
Ryan McCombs was the third singer for the band. He was known as the lead singer of SOiL, who have a hit song called Halo. His first album with Drowning Pool was Full Circle. Singles from the album are Enemy Shame 37 Stitches and Soldiers. Unlike the two singers the band had before, Ryan stayed in the band to record another album with them.