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.
Melissa Etheridge. Melissa Lou Etheridge (born May 29, 1961) is an American singer-songwriter, guitarist, and activist. Her self-titled debut album Melissa Etheridge was released in 1988 and became an underground success. The album peaked at No. 22 on the Billboard 200, and its lead single, Bring Me Some Water, garnered Etheridge her first Grammy Award nomination for Best Rock Vocal Performance, Female.