Solve the problem.In 2004, exit polls on the day of the election showed presidential candidate John Kerry ahead of George W. Bush. Later, it was found that those that voted for Bush were less interested in answering exit polls than other voters. This fact illustrates that the 2004 presidential exit polls were flawed because
A. of sampling variability.
B. the sample size was too small.
C. they were not a stratified survey.
D. the sampling proportion was too small.
E. of non-response bias.
Answer: E
Mathematics
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and line 
A. 
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C. 
D. 
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A. 1,000,000 B. 10,000 C. 100,000 D. 50
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A. 
B. 
C. 
D. 
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