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.
Closer - The Chainsmokers feat. Halsey. Closer is a song by American DJ duo The Chainsmokers, featuring American singer Halsey. Andrew Taggart also provides his vocals in the song, thus marking the first time one of the Chainsmokers has sung in one of their songs. It was released on July 29, 2016, by Disruptor and Columbia Records.