Suppose that a customer service center claims that the telephone calls it receives last 112 seconds on average, with a standard deviation of 9 second. If you took a sample of 324 telephone calls, which of the following mean times would be within the 95% confidence interval

Question

2 December, 05:52

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Adelyn Orr · Answer 1

Adelyn Orr 2 December, 06:04

0

112.5 seconds is the answer

Sadie Pacheco · Answer 2

For those on apex where the question says 113 instead of the above 112, the answer is 113.5 seconds. : - )