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.
T.O.N.Y. is a song by American singer Solange Knowles. It was written and produced by Jack Splash and Cee-Lo Green for her second studio album Sol-Angel and the Hadley St. Dreams (2008) and released on March 31, 2009 as the album's third and final single (see 2009 in music).