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sertanlavr [38]
3 years ago
15

Suppose that a customer service center claims that the telephone calls it recieves last 113 seconds on average, with a standard

deviation of 9 seconds. if you took a sample of 324 phone calls, which of the following mean times would be within the 95% confidence interval?
A. 116.5 seconds
B. 114.5 seconds
C. 113.5 seconds
D. 115.5 seconds
Mathematics
2 answers:
zimovet [89]3 years ago
8 0

Answer: 113.5 sec

Step-by-step explanation:

Apex 2019

atroni [7]3 years ago
3 0

Answer:

113.5 seconds

Step-by-step explanation:

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Hey there!

We can solve this problem by doing PEMDAS, which lists:

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