ml-recall

#median

2 questions from Statistics & Estimation, Linear Models & Regularization

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Question 1: Single choice

mediumAI-checkedStatistics & Estimation

At one input the observed targets are $[1, 2, 8, 9]$ , equally weighted, and the model can only output a constant $a$ . Which values of $a$ minimize the mean absolute error?

Every value from 2 to 81
Only $a = 5$ , the mean of the targets2
Every value from 1 to 93
Only $a = 2$ and $a = 8$ , the two middle targets4

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