| 1. | The average of 3, 7, 9 and 13 is 8 .
3，7，9和13的平均数为8。 |
| 2. | The readings we took were well above average .
我们记录的读数远远高于平均数。 |
| 3. | A more accurate method is to compute the average .
一个更精确的方法就是求平均数。 |
| 4. | 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。 |
| 5. | In chapter 3 we show a flow chart for finding the average of 100 numbers .
在第三章我们给了一个求100个数的平均数的程序框图。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | From the information in this table, we can easily compute an estimate of the value of the mean of this grouped data .
根据表中的资料可以计算出这个分组资料平均数的一个估计值。 |
| 9. | Managers also encounter situations in which it is useful to test for the equality of more than two population means .
管理人员还会遇到需要检验两个以上的总体平均数是否等同的问题。 |
| 10. | The technique is often used to eliminate seasonal components is from data, for which a 12-month moving average would be needed .
这种技术经常被用来消除季节因素，对此，需要12个月的移动平均数。 |
