The arithmetic mean is also called the "average." It is used in mostscientific experiments. Mathematically, the arithmetic mean is given simply by: arithmetic mean = Sum of all datapoints Total number of data-points (n) or in a more complicated form (wikipedia): ...
If historical, or ex-post, data are known, an analyst can easily compute historical average return and risk measures. If Xt represent a data item for period t, the arithmetic average , over n periodsChengFew LeeAlice C. LeeSpringer US...
"the average income in New England is below that of the nation" "of average height for his age" "themeanannual rainfall" 2. characterized by malice; "a hateful thing to do" "in ameanmood" 3. having or showing an ignoble lack of honor or morality; ...
The mean is a number that is the average of a set of numbers. 近义词 average 双语例句 例: Take a hundred and twenty values and calculate the mean. 取120个值计算平均数。 例: the mean score for 26-year-olds. 26岁的人的平均得分。 PHRASE. 习语 I mean 1. 也就是说 You say 'I mean...
Discover What MEAN stack is, a technology stack comprising MongoDB, Express.js, AngularJS, and Node.js for creating dynamic web applications.
(Mathematics) an 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:meanAlso called:averageComparegeometric mean Collins English Dictionary – Complete and Unabridged, 12th Editio...
英 un.算术平均数;算术中项;算术平均值;算术均数 网络等差中项;算术中顶;算数平均数 复数:arithmetic means 权威英汉双解 英汉 英英 网络释义 arithmetic-mean — see also mean 释义: 全部,算术平均数,算术中项,算术平均值,算术均数,等差中项,,算数平均数...
Null hypothesis: The average age was 60. Alternative hypothesis: The average age was less than 60.Which can be expressed with symbols as:H0: μ=60 H1: μ<60This is a 'left tailed' test, because the alternative hypothesis claims that the proportion is less than in the null hypothesis....
The arithmetic mean, denoted x, of a set of n numbers x1, x2,…, xn is defined as the sum of the numbers divided by n: The arithmetic mean (usually synonymous with average) represents a point about which the numbers balance. For example, if unit masses are placed on a line at ...
mean squared error (MSE), the average squared difference between the value observed in a statistical study and the values predicted from a model. When comparing observations with predicted values, it is necessary to square the differences as some data values will be greater than the prediction (...