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2 33 What is the margin of error for this estimate? a 0.023 0.025 C 0.027 6 0.029 8 34 What is the sample size used to obtain this estimate? 9 a 1301 b 1285 1215 1147 35 Among the factors involved in building a confidence interval are: the sample size n, the level of confidence, and the margin of error. Which of the following statements are true? 6 a For a given sample size, a higher confidence level means a smaller margin of error. b For a given confidence level, larger samples provide smaller margins of error. 8 c For a given confidence level, a sample 16 times as large will make a margin of error one-fourth as big. 9 d Both a and b are true. 0 e Both b and c are true