6

I'm sorry for being so weak in math. (I'm a student) For eg. this is a correlation matrix.

```
Q1 Q2 Q3
Q1 1.000000 0.707568 0.014746
Q2 0.707568 1.000000 -0.039130
Q3 0.014746 -0.039130 1.000000
```

Why is it symmetric? Why is Q1:Q2, the same as Q2:Q1? Shouldn't they be inverses of each other? How do I read this and understand the relation?

The correlation between random variables $X$ and $Y$ is $\mathbb E [(X-\mu_x)(Y-\mu_y)]/\sigma_x \sigma_y$. You should be able to answer your question using the properties of expectations of products. Welcome to the site!

– Emre – 2018-05-07T17:43:12.130I'm using the Pearson correlation – LazyAwkwardVaish Ok – 2018-05-07T17:44:02.000