et be an unknown population parameter associated with the collection of observations (X₁, Y₁), (X2, Y₂), ..., (Xn, Yn) here, for €1, €2,..., En iid N(0,0²), Y₁ = BX₁ + €₁, for i=1,2,..., n. This similar to the regression model we examined in class, but without the intercept term this question, we are going to derive the regression estimator for the model, using the same pproach from the lecture.

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Let be an unknown population parameter associated with the collection of observations
(X₁,Y₁), (X2, Y₂), ..., (Xn, Yn)
iid
where, for €1, €2,..., En ~ N(0,0²),
Y₁ = 3X₁ + €₁,
for i=1,2,..., n.
This similar to the regression model we examined in class, but without the intercept term
In this question, we are going to derive the regression estimator for the model, using the same
approach from the lecture.
Transcribed Image Text:Let be an unknown population parameter associated with the collection of observations (X₁,Y₁), (X2, Y₂), ..., (Xn, Yn) iid where, for €1, €2,..., En ~ N(0,0²), Y₁ = 3X₁ + €₁, for i=1,2,..., n. This similar to the regression model we examined in class, but without the intercept term In this question, we are going to derive the regression estimator for the model, using the same approach from the lecture.
1.
Write down the log-likelihood function for €1, €2,..., En based on the pdf of N(0, ²), i.e., derive
the expression for:
Using this answer and the fact that
l(0²) = [log ƒ(€₁; 0²)
i=1
€₁ = Y₁ - 0X₁,
derive the expression for the log-likelighood function w.r.t. the unknown parameters (0,0²), i.e.,
n
l(0,0²) = log f(Xi, Yi; 0,0²)
i=1
Transcribed Image Text:1. Write down the log-likelihood function for €1, €2,..., En based on the pdf of N(0, ²), i.e., derive the expression for: Using this answer and the fact that l(0²) = [log ƒ(€₁; 0²) i=1 €₁ = Y₁ - 0X₁, derive the expression for the log-likelighood function w.r.t. the unknown parameters (0,0²), i.e., n l(0,0²) = log f(Xi, Yi; 0,0²) i=1
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