重新计算平均值

问题描述

在我的Java应用程序中，我需要根据以下数据重新计算平均值:

In my Java application I need to recalculate an average value based on the following data:

1. 我知道当前的平均价值-avgValue
2. 我知道avgValue是12个值的列表的平均值-count.

1. I know current avg value - avgValue
2. I know that avgValue is an average value for list of 12 values - count.

基于此信息，当将新的value添加到此之前的12个值的列表时，如何重新计算avgValue.什么是13个值列表中的新avgValue-count + 1?

Based on this information how to recalculate avgValue when a new value is added to this list of previous 12 values. What is the new avgValue for list of 13 values - count + 1 ?

推荐答案

Current Sum = avgValue * 12
New sum = current Sum + New value
New average = New sum / 13

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