Variance can't be used to analyze ordinal scale data,because these data do not meaningfully convey distance.

Question

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Variance is a measure of the spread or dispersion of data. However, in the case of ordinal scale data, the values do not have a consistent or meaningful numerical distance between them. For example, if we use a rating scale of "excellent," "good," "fair," and "poor," there is no consistent numerical distance between the categories. Therefore, variance cannot be meaningfully calculated for ordinal data.

Variance Can't Be Used to Analyze Ordinal Scale Data,because These