How is the interval scale more sophisticated than the nominal and ordinal?
In an ordinal scale it is possible to order the categories by some measure. However, it is not possible to know if the difference between the categories is the same or different.For example, clothing items may be classed as extra small (XS), small (S), medium (M), large (L) and extra large (XL). This is an ordinal scale since you know that the sizes increase in the order in which these have been listed. But you do not know if the difference between S and M is the same as the difference between L and XL (or each adjacent pair).Another example is attitude surveys where answers may be "strongly disagree", "disagree", "neither disagree not agree", "agree", "strongly agree".In an ordinal scale it is possible to order the categories by some measure. However, it is not possible to know if the difference between the categories is the same or different.For example, clothing items may be classed as extra small (XS), small (S), medium (M), large (L) and extra large (XL). This is an ordinal scale since you know that the sizes increase in the order in which these have been listed. But you do not know if the difference between S and M is the same as the difference between L and XL (or each adjacent pair).Another example is attitude surveys where answers may be "strongly disagree", "disagree", "neither disagree not agree", "agree", "strongly agree".In an ordinal scale it is possible to order the categories by some measure. However, it is not possible to know if the difference between the categories is the same or different.For example, clothing items may be classed as extra small (XS), small (S), medium (M), large (L) and extra large (XL). This is an ordinal scale since you know that the sizes increase in the order in which these have been listed. But you do not know if the difference between S and M is the same as the difference between L and XL (or each adjacent pair).Another example is attitude surveys where answers may be "strongly disagree", "disagree", "neither disagree not agree", "agree", "strongly agree".In an ordinal scale it is possible to order the categories by some measure. However, it is not possible to know if the difference between the categories is the same or different.For example, clothing items may be classed as extra small (XS), small (S), medium (M), large (L) and extra large (XL). This is an ordinal scale since you know that the sizes increase in the order in which these have been listed. But you do not know if the difference between S and M is the same as the difference between L and XL (or each adjacent pair).Another example is attitude surveys where answers may be "strongly disagree", "disagree", "neither disagree not agree", "agree", "strongly agree".