A model having more parameters than can be estimated from the data. For example, suppose that the yields of two types of tomatoes are to be compared using the data {yjk}, where j (=1, 2) signifies the treatment and k is the number of the observation. Consider the model
where the {εjk} are independent random errors, each with mean 0 and variance σ2. As it stands, this model is overparameterized, because for each value of j, only (μ+τj) can be estimated. The value attributed to μ can be arbitrarily chosen. However, the problem can be solved either by rewriting the model
or by retaining the original model and adding a constraint such as τ1+τ2=0.
- heterogeneous nuclear RNA
- heterogeneous nucleation
- heterogeneous simple shear
- heterojunction
- heterojunction bipolar transistor
- heterojunction FET
- heterojunction photodiode
- heterokaryon
- heterokaryosis
- heterokonts
- heterolithic bedding
- heterolithic unconformity
- heterological
- heterologicality, paradox of
- heterolytic fission
- heterometry((in embryonic development))
- heteromorphosis
- heteronomy
- heteronormativity
- heteronuclear
- heterophenomenology
- heteroplasmy
- heteropolar bond
- heteropoly compound
- heteropolymer