5) A political party wishes to estimate the proportion of voters that support the party in a particular state. The party will poll a random sample of n voters from the state. Which of the following is likely to result in the smallest margin of error? a) n = 400, confidence level = 95% b) n = 400, confidence level = 98% c) n = 400, confidence level = 99% d) n = 500, confidence level = 95% e) n = 500, confidence level = 99%
5) A political party wishes to estimate the proportion of voters that support the party in a particular state. The party will poll a random sample of n voters from the state. Which of the following is likely to result in the smallest margin of error?
a) n = 400, confidence level = 95%
b) n = 400, confidence level = 98%
c) n = 400, confidence level = 99%
d) n = 500, confidence level = 95%
e) n = 500, confidence level = 99%
6) A study is carried out to compare the effectiveness of two types of fertilizer, A and B. 260 seeds of a particular plant are randomly assigned to the two types of fertilizer. Of the 120 seeds assigned to fertilizer A, 83 are found to germinate, and of the 140 assigned to fertilizer B, 78 are found to germinate. Which of the following is a 99% interval for Pa - Pb, the difference between the two proportions of all seeds germinating for the two types of fertilizer? (ANSWER CHOICES IN THE ATTACHED PICTURE!)
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