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汉语拼音：píng jūn shù

一般指算术平均数。即若干个数的和，除以这些数的个数所得的商。如（1+2+3）÷3=2，2就是1，2，3的平均数。

1. 两个或两个以上的数相加的和除以相加的数的个数所得的商。如(3＋5＋7)÷3＝5，5就是3、5和7的平均数。

• Take a hundred and twenty values and calculate the mean.

  取120个值计算平均数。

• Add them together, divide by five, and you've got the average. Okay?

  把它们相加再除以5就是平均数，明白吗？

• Income in New England is commonly 10 % below the national average.

  在新英格兰人们的收入通常比全国平均数低10%.

• If you average 4, 5 and 9, you get 6.

  如果你求4, 5和9的平均数, 得6.

• The average works out roundly at 100.

  平均数算下来大体为100.

• The statisticians averaged out the number of people receiving college degrees in every one thousand persons.

  统计学家算出了每千人中受大学教育的平均数.

• They averaged out the numbers and got the result 7.

  他们算出这几个数字的平均数是7.

• His income is 3000 above the national mean.

  他的收入高于国民收入平均数3000美元.

• The readings we took were well above average.

  我们记录的读数远远高于平均数.

• It is much easier to indicate how to find the mean by expressing the procedure algebraically.

  用代数的方法来表现这个过程,就更容易说明平均数是如何求得的.

• In information theory , the average information content - a measure of nonrandom ness in a signal.

  在信息论中, 信息容量的平均数 —— 信号非随机性的量度.

• The mean of a normally distributed population lies at the center of its normal curve.

  正态分布总体的平均数在正态曲线的中心.

• The easiest way to find the answer is to average the data.

  找出答案最简单的方法是求出数据的平均数.

• Do you know how to work out an average?

  你知道如何计算平均数 吗 ?

• Now please follow suit to create more problems andworkout the averages.

  请照此编出一些简单的求平均数的应用题,并列出算式.