This is called the mean deviation, i.e. mean deviation = , where n is the number of students in the class. For class 1 this is 64/5 = 12.8. Another way to deal with the negative differences is to square each difference before adding.
n. 1. Two individuals or units regarded as a pair: the mother-daughter dyad.2. Biology One pair of homologous chromosomes resulting from the division of a tetrad during meiosis.yad. n. 1. (Mathematics) maths an operator that is the unspecified product of two vectors. It can operate on a vector to produce either a scalar or vector product. 2. (Chemistry) an atom or group that has a valency of two.
In sorting out and separating abbreviations from words in preparing the dictionary's second edition, a card marked D or d meaning density somehow migrated from the abbreviations stack to the words stack. The D or d entry ended up being typeset as a word, dord, and defined as a synonym for density.nown from a single source c. 1000; the word reappeared with modern meaning mark c. 1530; not common until 18c. Morse telegraph sense is from 1838. On the dot punctual is 1909, in reference to a clock dial face. Dot-matrix first attested 1975.