Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. 6) Ages of survey respondents. 7) Amount of fat (in grams) in cookies. 8) The subjects in which college students major. 9) Survey responses of "good, better, best". 10) Nationalities of survey respondents. 11) The sample of spheres categorized from softest to hardest.

6) Ages of survey respondents – Ratio  • Ages are measured on a numerical scale with a true zero (indicating no age), and differences/ratios are meaningful. 7) Amount of fat (in grams) in cookies – Ratio  • The measurement in grams has a true zero and supports meaningful ratios (e.g., one cookie can have twice as much fat as another). 8) The subjects in which college students major – Nominal  • Majors are categorical labels without any inherent order. 9) Survey responses of "good, better, best" – Ordinal  • These responses indicate a rank order, with "best" being higher than "better", although the exact differences between the categories are not necessarily equal. 10) Nationalities of survey respondents – Nominal  • Nationality is a categorical variable with names and no inherent ranking. 11) The sample of spheres categorized from softest to hardest – Ordinal  • The spheres are classified based on an order of softness to hardness, which conveys rank order without specifying the precise differences between each level.