The mean (or average) of a set of data values is the sum of all of the data values divided by the number of data values. That is: The marks of seven students in a mathematics test with a maximum possible mark of 20 are given below: 15 13 18 16 14 17 12. Find the mean of this set of data values.
The name dubplate also refers to an exclusive, 'one-off' acetate disc recording pioneered by reggae sound systems but also used by drum and bass and other electronic music producers, DJs and sound systems.he name dubplate also refers to an exclusive, 'one-off' acetate disc recording pioneered by reggae sound systems but also used by drum and bass and other electronic music producers, DJs and sound systems.
Key signatures are a type of musical notation that indicate which key the song is to be played in. But key signatures, despite the name, are not the same thing as key. Key signatures are simply notational devices; just as a note is the notational name for a pitch, key signatures are the notational names for keys.ey signatures are a type of musical notation that indicate which key the song is to be played in. But key signatures, despite the name, are not the same thing as key. Key signatures are simply notational devices; just as a note is the notational name for a pitch, key signatures are the notational names for keys.