A statistics class at a community college was curious about public support for funding community college education. After determining that they would need a sample size of at least 500 , they distributed a survey at their college to 1,000 people on campus, selected at random. Their professor noted a problem with their design.

The same 1,000 people were also surveyed about their preference for jellied vs. whole cranberry sauce for thanksgiving dinner.

Would the same survey results be more valid ( for either question) if they gave it to 1,000 people composed of small groups who had come shopping together at the mall on Black Friday ( the day after Thanksgiving)? Explain your answer.