Mathematics, 22.10.2019 03:10, byers024

The following data shows the average time span of international phone calls by a

sample of 15 executives of a company having operations overseas:

time in (minutes)

12.0 15.0 16.3 13.2 12.6 18.2 8.7 13.5

16.9 11.3 15.4 16.2 12.6 10.5 9.6 6.0

an approximate 95% confidence interval for the average time span of calls is

(a) 11.244 to 14.756

(b) 12.344 to 15.856

(c) 10.564 to 14.876

(d) 12.831 to 16.667

(e) 13.453 to 15.887

The following data shows the average time span of international phone calls by asample o

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The following data shows the average time span of international phone calls by a

sample o...