The 'weight' in a weighted index number should ideally represent: MCQ with Answer and Explanation

Explanation:
Fisher's ideal quantity index = √(Laspeyres quantity index × Paasche quantity index), mirroring the price index formulation to satisfy consistency tests for quantity measurement.

Explanation:
Standardized Death Rates adjust for age distribution differences, allowing for a fair comparison of mortality between different populations.

Explanation:
The updated probability after observing the evidence is the posterior probability.