Question: 1. What is an estimable function? How do you test whether a linear function of model coefficients is estimable? You can also use the example

1. What is an estimable function? How do you test whether a linear function of model coefficients is estimable? You can also use the example below to answer these questions. Researchers randomly assigned a total of six experimental units to two treatments and measured a response of interest. The model used is . Let yij=+ti+eij;i=1,2;j=1,2,3. Let yi1,yi2,yi3 denote the responses of the experimental units in the i th treatment group, and eij is the error. Is +t1 estimable? Is t1 estimable? Is t1t2 estimable? Is t1+t2 estimable?

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