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.
Jump to: navigation, search. Cat's in the Cradle, is a folk rock song by American singer/songwriter Harry Chapin. It appeared on Chapin's 1974 album Verities & Balderdash. It was written by Harry's wife Sandy, a poet and writer, long before the birth of their son Joshua. When Sandy showed it to Harry, he had only casual interest.