For each variable, determine the scale of measurement (nominal, ordinal, interval, or ratio) and the type of variable (categorical or numerical); if it is numerical is it discrete or continuous? Justify your decision for each one
Note annual income in surveys are measured in interval and for an individual it is an ratio.
Highest level of education can also be measured in ordinal scale ,with each scale referring to certain education qualifications
Scores are discrete only certain marks can be scored.
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