A consumer research firm is hired to determine which brand of laundry soap is most preferred by consumers. After surveying a sample of housewives, they find that the most preferred brand is White Suds. Which of the following is the greatest threat to external validity in this study?
A)Consumers' lack of interest in laundry products
B)The absence of difference in laundry soaps between manufacturers
C)The stereotypical assumption that only women do laundry
D)Including both males and females in research investigations

Question

Quizplus · Accepted Answer

The greatest threat to external validity in this study is the stereotypical assumption that only women do laundry. This assumption could lead to an insufficient and biased sample of only housewives being surveyed, which may not accurately represent the entire population's preferences. It's essential to involve a diverse group in the study design to ensure the results' generalizability.

A Consumer Research Firm Is Hired to Determine Which Brand