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QUESTION
13. The 90% confidence interval for the proportion of busy signals encountered by customers is [0.05, 0.13]. What is the margin of error for this
13. The 90% confidence interval for the proportion of busy signals encountered by customers is [0.05, 0.13].
What is the margin of error for this confidence interval?
A. This calculation requires a standard error.
B. 0.01
C. 0.08
D. 0.04
E. 0.02
The Answer is D but I need help solving the question by showing work.
