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.
He played the MI6 officer Bill Tanner in Skyfall and Quantum of Solace, the James Bond films, and won acclaim for his stage performances in productions of Othello, Mary Stuart and Hamlet. When he was asked about rumours linking him with the Doctor Who role in April, he admitted that he had never watched the programme.