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17.A group interested in the result of an upcoming ballot initiative about the public school system is conducting a poll to find the likely outcome. They randomly select registered voters with school-age children from the voting population. The first question in the poll ascertains whether or not the participant is a likely voter and only those people who plan to vote are asked to complete the poll. What is the flaw in this sample?
18.The United States budget is about $3.8 trillion and foreign aid comprises 1% of the budget. If African countries receive a combined 20% of the United States' foreign aid, how much money is sent to the continent?
19.A group interested in the result of an upcoming gubernatorial election is conducting a poll to find the likely result. They randomly select citizens over the age of 18 to poll. Each participant is asked two multiple-choice questions: which candidate they prefer and which attribute of the candidate or their platform compelled their choice. What is the flaw in this poll?
20.The division of your company that you oversee contains 18 employees whose total salary last year was $855,000. The average salary of all company employees with the same level of responsibility and qualifications is $50,000. Is your department above or below the company average?
