Question: (Statistical Inference) Given the following model, yi = 1 + 2 x i + 3 z i + i I have collected data and computed

(Statistical Inference) Given the following model,

yi = 1+ 2 xi + 3 zi + i

I have collected data and computed the following moment matrix with M = [1, x, z, y] for you:

| 120 150 80 450 |

| 150 300 250 2000 |

| 80 250 600 1200 |

| 450 2000 1200 25000 |

How many observations have I collected? What are the average values for each variable, that is y, x, and z?

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