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 and Jack White to Sing Quantum of Solace Theme Song. The news does not come as a shock to Bond fans, as Universal Exports first reported the possibility of Alicia Keys singing the Quantum of Solace theme song back on July 11, 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.