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.
Somebody To Love by Jefferson Airplane. This was written by Grace Slick's brother-in-law, Darby Slick, in 1965. They were in a San Francisco band called The Great Society, which also included Jerry Slick, who was Grace's husband and Darby's brother (Jerry played drums; Darby played guitar).