Can you help me understand what the sum of squares is?

你能帮我解释一下什么是平方和吗？

We learned how to calculate the sum of squares in class.

我们在课堂上学习了如何计算平方和。

This formula requires you to first find the sum of squares of each number.

这个公式需要你先求出每个数的平方和。

Calculating the sum of squares of two numbers is a basic operation in mathematics.

计算两个数的平方和是数学中的基本操作。

In statistics, the sum of squares is used to measure the dispersion of data.

在统计学中，平方和用于衡量数据的离散程度。

By minimizing the residual sum of squares, we can find the best fit line.

通过最小化残差平方和，我们可以找到最佳拟合线。

If the residual sum of squares is small, it means the model fits the data well.

如果残差平方和较小，说明模型对数据的拟合较好。

Calculating the residual sum of squares is an important step in regression analysis.

计算残差平方和是回归分析中的一个重要步骤。

When the residual sum of squares is zero, it means the model perfectly fits the data.

当残差平方和为零时，说明模型完美拟合了数据。

In regression analysis, the residual sum of squares is a measure of the goodness of fit of the model.

在回归分析中，残差平方和是衡量模型拟合优度的一个指标。