arithmetic mean n the average value of a set of integers, terms, or quantities, expressed as their sum divided by their number the arithmetic mean of 3, 4, and 8 is 5 (Often shortened to)
mean (Also called)
average Compare →
geometric mean
average
n
1 the typical or normal amount, quality, degree, etc.
above average in intelligence
2 (Also called)
arithmetic mean the result obtained by adding the numbers or quantities in a set and dividing the total by the number of members in the set
the average of 3, 4, and 8 is 5
3 (of a continuously variable ratio, such as speed) the quotient of the differences between the initial and final values of the two quantities that make up the ratio
his average over the journey was 30 miles per hour
a a loss incurred or damage suffered by a ship or its cargo at sea
b the equitable apportionment of such loss among the interested parties
5 often pl (Stock Exchange) a simple or weighted average of the prices of a selected group of securities computed in order to facilitate market comparisons
6 ♦
on (the or an) average usually; typically
on average, he goes twice a week
adj
8 mediocre or inferior
his performance was only average
9 constituting a numerical average
the average age, an average speed
10 approximately typical of a range of values
the average contents of a matchbox
vb
11 tr to obtain or estimate a numerical average of
12 tr to assess the general quality of
13 tr to perform or receive a typical number of
to average eight hours' work a day
14 tr to divide up proportionately
they averaged the profits among the staff
15 tr to amount to or be on average
the children averaged 15 years of age
16 intr (Stock Exchange) to purchase additional securities in a holding whose price has fallen (average down) or risen (average up) in anticipation of a speculative profit after further increases in price
(C15 averay loss arising from damage to ships or cargoes (shared equitably among all concerned, hence the modern sense), from Old Italian avaria, ultimately from Arabic awar damage, blemish)
♦
averagely adv
average adjuster
n a person who calculates average claims, esp. for marine insurance
See →
average →
4
average deviation
n (Statistics) another name for →
mean deviation
Dow-Jones average
n (U.S) a daily index of stock-exchange prices based on the average price of a selected number of securities
(C20: named after Charles H. Dow (died 1902) and Edward D. Jones (died 1920), American financial statisticians)
general average
n (Insurance) loss or damage to a ship or its cargo that is shared among the shipowners and all the cargo owners, (Abbrev.)
GA Compare →
particular average
moving average
n (Statistics) (of a sequence of values) a derived sequence of the averages of successive subsequences of a given number of members, often used in time series to even out short-term fluctuations and make a trend clearer
the 3-term moving average of 4, 6, 8, 7, 9, 8 is 6, 7, 8
Nikkei Stock Average
n an index of prices on the Tokyo Stock Exchange
(C20: from Nik(on) Kei(zai Shimbun), a Japanese newspaper group)
particular average
n (Insurance) partial damage to or loss of a ship or its cargo affecting only the shipowner or one cargo owner, (Abbrev.)
PA Compare →
general average
weighted average
n an average calculated by taking into account not only the frequencies of the values of a variable but also some other factor such as their variance. The weighted average of observed data is the result of dividing the sum of the products of each observed value, the number of times it occurs, and this other factor by the total number of observations