Question: Hello guys I do have questions for this problem. The model Yi = 0 + i , where 1, . . . , n are

Hello guys I do have questions for this problem.

The model Yi = 0 +i , where 1, . . . , n are iid normally distributed with mean 0 and variance 2 .

I want to find

  1. Derive the least squares estimator of 0.
  2. Derive an unbiased estimator of 2

I'd like to solve this problem by using matrix form.(y= XB + )

so in this case, it seems X is 1? how do I solve q1,q2 by using matrix form ??

Thanks!

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