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i need help 1. Suppose you have three items and you want to estimate their weights (call them 01, 02 & 03). You have a

i need help

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1. Suppose you have three items and you want to estimate their weights (call them 01, 02 & 03). You have a scale that is unbiased (i.e., it is not accurate but the amount of error is random and not related to the weight that is being measured). You have the following options. i. Weigh each of the three objects twice separately. So, you will have 6 observations. ii. Weigh two of them at a time and repeat that. Again, you have six observations. a) Write down the design matrices, get the the estimates of the parameters. b) Show that every lpf is estimable (for both the models). c) What are the BLUE's of the 0's in the two models? d) Which design would you prefer and why

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