Final answer:
Questions #2 and #4 are statistical questions because they anticipate variability in the behavior of groups, while questions #1 and #3 are not since they inquire about specific, singular measurements.
Step-by-step explanation:
A statistical question is one that anticipates a variety of answers and is about a group or collection of data. Examining the provided questions, #2 (When do university students eat lunch?) and #4 (How many coffee drinks do customers at a coffee shop order?) are statistical questions because they inquire about the behavior of a group and expect variability in their answers. In contrast, question #1 (How long is Mike's foot?) and #3 (What is the weight of John's math textbook?) ask about specific individual measurements and do not anticipate variability, thus they are not statistical questions.