The symbol M denotes
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m (the greek letter "mu") is used to denote the population mean. The population mean is worked out in exactly the same way as the sample mean: add all of the scores together, and divide the result by the total number of scores. In journal articles, the mean is usually represented by M, and the median by Mdn.
The modern English alphabet is a Latin alphabet consisting of 26 letters, each having an upper- and lower-case form. It originated around the 7th century from Latin script. Since then, letters have been added or removed to give the current Modern English alphabet of 26 letters (which eventually became the ISO basic Latin alphabet). The word alphabet is a compound of the first two letters of the Greek alphabet, alpha and beta.
The exact shape of printed letters varies depending on the typeface (and font), and the standard printed form may differ significantly from the shape of handwritten letters (which varies between individuals), and cursive especially.
Written English has a large number of digraphs. It stands out almost uniquely as a European language without diacritics in native words. A diaeresis may be used to distinguish two vowels with separate pronunciation, such as "coöperation",[nb 1] from a double vowel.[1] Very occasionally, a grave may be used to indicate that a normally silent vowel is pronounced (as in learnèd, an adjective).
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