If you have nominal variables there is no ordering or distance function. So how could you define any of the summary statistics that you mention? I don't think you can. Quartiles and range require at least require ordering and means and variance require numerical data. I think bar graphs and pie chart are typical examples of the proper ways to summarize qualitative variables that are not ordinal.

If you have nominal variables there is no ordering or distance function. So how could you define any of the summary statistics that you mention? I don't think you can. Quartiles and range at least require ordering and means and variance require numerical data. I think bar graphs and pie chart are typical examples of the proper ways to summarize qualitative variables that are not ordinal.

If you have nominal variables there is no ordering or distance function> So how could you define any of the summary statistics that you mention? I don't think you can. Quartiles and range require at least require ordering and means and variance require numerical data. I think bar graphs and pie chart are the proper ways to summarize qualitative variables that are not ordinal.

If you have nominal variables there is no ordering or distance function. So how could you define any of the summary statistics that you mention? I don't think you can. Quartiles and range require at least require ordering and means and variance require numerical data. I think bar graphs and pie chart are typical examples of the proper ways to summarize qualitative variables that are not ordinal.