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.
Curtis Grimes. To preview a song, mouse over the title and click Play. Open iTunes to buy and download music. Biography. Like thousands of guys, Curtis Grimes started singing sad songs after he broke up with his gal. But unlike most of them, Grimes was good enough to make a living off his music after he got over his heartbreak.