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Choose the One Alternative That Best Completes the Statement or Answers

Question 4

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-The cell phone conversations of a random sample of 50 students has a standard deviation of 9.7 minutes. Find the margin of error, E, using a 90% confidence interval.


A) 2.26
B) 0.32
C) 1.37
D) 1.23

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