Answer:In a survey of 525 subjects, each was asked how often he or she read a book. The survey subjects were interest users who responded to a question that was posted on a news website. It is flawed because it is a voluntary response sample 2. In a survey of 663 human resource professionals, each was asked about the importance of the education of a job applicant. The survey subjects were randomly selected by pollsters from a reputable market research firm. It appears to be sound because the data are not biased in any way 3. Several studies showed that after eating 4 servings of dairy a day, subjects had lowered risk of osteoporosis. A dairy farmers’ organized financed this research. What is wrong with this study? Self- interest study 4. Based on a study of weights of men and woman who are vegetarian, a searcher concludes that eating vegetables causes people to lose weight.