Layla and Other Assorted Love Songs peaked at #16 on Billboard' s Pop Albums chart and was certified gold by the RIAA. The album again made the Billboard 200 in 1972, 1974 and in 1977. In 2011, it charted in Britain, peaking at number 68. In 2000, the album was inducted into the Grammy Hall of Fame. In 2003, television network VH1 named Layla and Other Assorted Love Songs the 89th-greatest album of all time, and Rolling Stone ranked it number 117 on its list of  The 500 Greatest Albums of All Time .
Observation consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments. Any data recorded during an experiment can be called an observation. A scientific process or scientific method requires observations of nature and formulating and testing the hypothesis.
For other uses, see Aggregate (disambiguation). In statistics, aggregate data are data combined from several measurements. When data are aggregated, groups of observations are replaced with summary statistics based on those observations. In a data warehouse, the use of aggregate data dramatically reduces the time to query large sets of data.