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The Billboard Year-End chart is a chart published by Billboard which denotes the top song of each year as determined by the publication's charts. Since 1946, Year-End charts have existed for the top songs in pop, R&B, and country, with additional album charts for each genre debuting in 1956, 1966, and 1965, respectively.
The Billboard Hot 100 is the music industry standard record chart in the United States for songs, published weekly by Billboard magazine. Chart rankings are based on sales (physical and digital), online streaming, and radio airplay in the U.S. [1] A new chart is compiled and released online to the public by Billboard' s website on Tuesdays but ...
Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...
List of record charts. A record chart, also known as a music chart, is a method of ranking music judging by the popularity during a given period of time. Although primarily a marketing or supermarketing tool like any other sales statistic, they have become a form of popular media culture in their own right. Record charts are compiled using a ...
For 6/6 = 1.0 acuity, the size of a letter on the Snellen chart or Landolt C chart is a visual angle of 5 arc minutes (1 arc min = 1/60 of a degree), which is a 43 point font at 20 feet. [10] By the design of a typical optotype (like a Snellen E or a Landolt C), the critical gap that needs to be resolved is 1/5 this value, i.e., 1 arc min.
A pie chart showing the percentage by web browser visiting Wikimedia sites (April 2009 to 2012) In mathematics, a percentage (from Latin per centum 'by a hundred') is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%), [1] although the abbreviations pct., pct, and sometimes pc are also used. [2]
The jukebox chart ceased publication after the June 17, 1957, issue, the disk jockey chart after July 28, 1958, the best-seller chart after October 13, 1958. [13] After July 28, 1958, the composite chart the "Top 100" chart was also discontinued; [ 14 ] and the "Hot 100" began the following week on August 4, 1958, listing " Poor Little Fool ...
Percentile. In statistics, a k-th percentile, also known as percentile score or centile, is a score below which a given percentage k of scores in its frequency distribution falls (" exclusive " definition) or a score at or below which a given percentage falls (" inclusive " definition). Percentiles are expressed in the same unit of measurement ...