Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, or neither."38% of adults in the United States regularly visit a doctor". This conclusion was reached by a college student after she had questioned 520 randomly selected members of her college.
A. Selection bias
B. No bias
C. Participation bias and selection bias
D. Participation bias
Answer: A
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Express the number in standard notation.2.0433 × 10-7
A. 0.00000020433 B. 0.000000020433 C. 0.0000020433 D. -204,330,000
Use the table to determine the probability. Round your answer to three decimal places if necessary.The table gives the number of degrees earned in a certain university in the 2007-2008 academic year.
If a student receiving a degree is randomly selected, what is the probability that the person selected is female?
A. 0.527 B. 0.577 C. 0.423 D. 0.373
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Solve the quadratic equation by completing the square.x2 - 14x + 45 = 0
A. x = 40, x = 5
B. x = 
, x = 
C. x = 9, x = 5
D. x = -9, x = -5