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Recall the general linear model given by Y = XB+ €, T where Y = (Y₁,...,Y) is the vector of responses, X is the n X p design matrix, ß = (Bo...., Bp-1) is the parameter vector and e = (₁, ..., en) is the error vector. Say that you have 145 observations and you want to write the simple linear model y = Bo + Bix +€ in matrix form. How many rows does X have? What is the value of the first element of X (ie X(1,1))?

Recall the general linear model given by Y = XB+ €, T where Y = (Y₁,...,Y) is the vector of responses, X is the n X p design matrix, ß = (Bo...., Bp-1) is the parameter vector and e = (₁, ..., en) is the error vector. Say that you have 145 observations and you want to write the simple linear model y = Bo + Bix +€ in matrix form. How many rows does X have? What is the value of the first element of X (ie X(1,1))?

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 16EQ
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Recall the general linear model given by Y = XB + €, where Y = (Y₁, ...,Y) is the vector of responses, X is the n X p design matrix, ß = (Bo, ..., Pp-1) is the parameter vector and € = (₁, ..., en) is the error vector. Say that you have 145 observations and you want to write the simple linear model y = $o + fix + in matrix form. How many rows does X have? What is the value of the first element of X (ie X(1,1))?
Transcribed Image Text:Recall the general linear model given by Y = XB + €, where Y = (Y₁, ...,Y) is the vector of responses, X is the n X p design matrix, ß = (Bo, ..., Pp-1) is the parameter vector and € = (₁, ..., en) is the error vector. Say that you have 145 observations and you want to write the simple linear model y = $o + fix + in matrix form. How many rows does X have? What is the value of the first element of X (ie X(1,1))?
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