In order to obtain meaningful answers to research questions on the basis of survey data, i.e. to be able to draw conclusions from samples to the population, adjustments often have to be made to the data to compensate for missing values or under- or over-representation of certain groups. In addition to our survey methodology consulting on weighting, imputation of missing values and non-response bias analysis, we also conduct these for you (for a fee).
Our Services for Weighting and Analysis of your Research Data
Determination of an unbiased or less biased estimator for the population.
Determination of imputation values to compensate for missing values.
Analysis to assess bias in results due to systematic non-response.