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Mathematics, 10.06.2020 04:57 babbygirl8597

Suppose that a customer service center claims that the telephone calls it receives last 114 seconds on average, with a standard deviation of 9
seconds. If you took a sample of 324 telephone calls, which of the following
mean times would be within the 95% confidence interval?
A. 115.5 seconds
B. 114.5 seconds
C. 116.5 seconds
D. 117.5 seconds

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Answers: 3

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