Final answer:
Class year and expected year of graduation are both qualitative and ordinal data. They describe attributes and have a natural order, respectively.
Step-by-step explanation:
Class year (freshman, sophomore, etc.) and expected year of graduation (2020, 2021, etc.) are both examples of qualitative data because they describe qualities rather than numerical values. Within the qualitative data types, they are ordinal because there is a natural order to the categories. Freshman to senior reflects a progression through an educational program, and the subsequent expected year of graduation implies closeness to completion of the program.
As for the other exercises:
Duration (amount of time) is quantitative continuous data since it can take any value within a range.
A number of times per week are quantitative discrete because it is counted as whole numbers.
The sampling method used in the study mentioned is systematic because of the regular interval selection of houses.
The colors of houses are qualitative (categorical) because they are descriptors without inherent numerical value.
The subject example provided regarding the freshman, sophomore, junior, and senior years further illustrates the ordinal nature of class years as they can be ranked.