Final answer:
The scale used to measure the likelihood of purchasing a product with options 'Not Likely' and 'Likely' is an ordinal scale, which allows for ordering of responses but does not measure the exact differences between them.
Step-by-step explanation:
The response options to the question about the likelihood of purchasing a product from ABC Company ('Not Likely' or 'Likely') represent an ordinal scale. This scale is best described as an example of a(n) ordinal scale because the responses can be ordered, but the differences between them cannot be measured. In comparison to other levels of measurement, the nominal scale has no order, the interval scale has order with measurable differences but no true zero point, and the ratio scale has a true zero point with order and measurable differences allowing for the computation of ratios.
An analogy to further explain an ordinal scale would be survey responses like 'excellent', 'good', 'satisfactory', and 'unsatisfactory', which can be ordered from most to least desired but without measurable intervals between them. The detailed explanation shows how ordinal scales are used for categorization with an inherent order, but it lacks the precise measurement that is found in interval or ratio scales.