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.
Though the Airplane recognized those songs as special, even they had little inkling as to how popular they would become. Nine months after she joined the band, Grace found herself a star as the lead singer of the bandâs two top ten hits. Grace Slick quickly emerged as an icon of the psychedelic scene that followed. She always downplayed her own significance in the press, suggesting that she got the most attention because she was the only woman in the band.