A study is conducted to determine whether the proportion of airline passengers complaining with post-flight respiratory symptoms is larger for flights that do not circulate cabin air than for flights that do circulate the air. After checking to make sure that all of the necessary conditions were met, we calculated the value of the z test statistic to be z = 0.84. Which of the following is the P-value associated with this test?
1.0
2.0.2005
3.0.401
4.0.7995
5.0.599
Question 2
To learn about the proportion of college students who are registered to vote, surveys were conducted in 2010 and in 2011. Suppose that in 2010, 39 of the people in a representative sample of 450 college students were registered to vote. In 2011, 33 of the people in a representative sample of 235 college students were registered to vote. For the 99 confidence level, determine the margin of error of the difference of the proportions.
1.0.0751
2.0.0495
3.0.0989
4.0.4131
5.0.0383
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