Along with a common misconception about unbiasedness.

Vector form of Y should be Y=X beta + epsilon. What you have the dimension doesn’t add up.

I believe you're right, because you can't go from (X^T) (B @ X) to X^T @ X @ B

Very important concepts that touch on statistic's fundamentals. Really love these "low-level" topics!

Great stuff. Simple to understand

Vector form of Y should be Y=X beta + epsilon. What you have the dimension doesn’t add up.

I believe you're right, because you can't go from (X^T) (B @ X) to X^T @ X @ B

Very important concepts that touch on statistic's fundamentals. Really love these "low-level" topics!

Great stuff. Simple to understand