$$
\mathbb{E}[\boldsymbol{X}^T\boldsymbol{X}] = \frac{1}{n}\boldsymbol{X}^T\boldsymbol{X}=\frac{1}{n}\begin{bmatrix}
-x_{00}^2+x_{01}^2 & x_{00}x_{10}+x_{01}x_{11}\\
-x_{10}x_{00}+x_{11}x_{01} & x_{10}^2+x_{11}^2\\
+x_{00}^2+x_{10}^2 & x_{00}x_{01}+x_{10}x_{11}\\
+x_{01}x_{00}+x_{11}x_{10} & x_{01}^2+x_{11}^2\\
\end{bmatrix},
$$
diff --git a/doc/pub/week35/html/week35-solarized.html b/doc/pub/week35/html/week35-solarized.html
index b763aaad1..6904719c5 100644
--- a/doc/pub/week35/html/week35-solarized.html
+++ b/doc/pub/week35/html/week35-solarized.html
@@ -2667,8 +2667,8 @@ $$
If we then compute the expectation value (note the \( 1/n \) factor instead of \( 1/(n-1) \))
$$
\mathbb{E}[\boldsymbol{X}^T\boldsymbol{X}] = \frac{1}{n}\boldsymbol{X}^T\boldsymbol{X}=\frac{1}{n}\begin{bmatrix}
-x_{00}^2+x_{01}^2 & x_{00}x_{10}+x_{01}x_{11}\\
-x_{10}x_{00}+x_{11}x_{01} & x_{10}^2+x_{11}^2\\
+x_{00}^2+x_{10}^2 & x_{00}x_{01}+x_{10}x_{11}\\
+x_{01}x_{00}+x_{11}x_{10} & x_{01}^2+x_{11}^2\\
\end{bmatrix},
$$
diff --git a/doc/pub/week35/html/week35.html b/doc/pub/week35/html/week35.html
index 55b418dfb..0abf499dc 100644
--- a/doc/pub/week35/html/week35.html
+++ b/doc/pub/week35/html/week35.html
@@ -2672,8 +2672,8 @@ $$
If we then compute the expectation value (note the \( 1/n \) factor instead of \( 1/(n-1) \))
$$
\mathbb{E}[\boldsymbol{X}^T\boldsymbol{X}] = \frac{1}{n}\boldsymbol{X}^T\boldsymbol{X}=\frac{1}{n}\begin{bmatrix}
-x_{00}^2+x_{01}^2 & x_{00}x_{10}+x_{01}x_{11}\\
-x_{10}x_{00}+x_{11}x_{01} & x_{10}^2+x_{11}^2\\
+x_{00}^2+x_{10}^2 & x_{00}x_{01}+x_{10}x_{11}\\
+x_{01}x_{00}+x_{11}x_{10} & x_{01}^2+x_{11}^2\\
\end{bmatrix},
$$
diff --git a/doc/pub/week35/ipynb/ipynb-week35-src.tar.gz b/doc/pub/week35/ipynb/ipynb-week35-src.tar.gz
index 15bf74d12..883997c43 100644
Binary files a/doc/pub/week35/ipynb/ipynb-week35-src.tar.gz and b/doc/pub/week35/ipynb/ipynb-week35-src.tar.gz differ
diff --git a/doc/pub/week35/ipynb/week35.ipynb b/doc/pub/week35/ipynb/week35.ipynb
index 468206125..36440b523 100644
--- a/doc/pub/week35/ipynb/week35.ipynb
+++ b/doc/pub/week35/ipynb/week35.ipynb
@@ -3411,8 +3411,8 @@
"source": [
"$$\n",
"\\mathbb{E}[\\boldsymbol{X}^T\\boldsymbol{X}] = \\frac{1}{n}\\boldsymbol{X}^T\\boldsymbol{X}=\\frac{1}{n}\\begin{bmatrix}\n",
- "x_{00}^2+x_{01}^2 & x_{00}x_{10}+x_{01}x_{11}\\\\\n",
- "x_{10}x_{00}+x_{11}x_{01} & x_{10}^2+x_{11}^2\\\\\n",
+ "x_{00}^2+x_{10}^2 & x_{00}x_{01}+x_{10}x_{11}\\\\\n",
+ "x_{01}x_{00}+x_{11}x_{10} & x_{01}^2+x_{11}^2\\\\\n",
"\\end{bmatrix},\n",
"$$"
]
diff --git a/doc/src/week35/week35.do.txt b/doc/src/week35/week35.do.txt
index 2344c06f9..d888fabc0 100644
--- a/doc/src/week35/week35.do.txt
+++ b/doc/src/week35/week35.do.txt
@@ -2151,8 +2151,8 @@ If we then compute the expectation value (note the $1/n$ factor instead of $1/(n
!bt
\[
\mathbb{E}[\bm{X}^T\bm{X}] = \frac{1}{n}\bm{X}^T\bm{X}=\frac{1}{n}\begin{bmatrix}
-x_{00}^2+x_{01}^2 & x_{00}x_{10}+x_{01}x_{11}\\
-x_{10}x_{00}+x_{11}x_{01} & x_{10}^2+x_{11}^2\\
+x_{00}^2+x_{10}^2 & x_{00}x_{01}+x_{10}x_{11}\\
+x_{01}x_{00}+x_{11}x_{10} & x_{01}^2+x_{11}^2\\
\end{bmatrix},
\]
!et