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A sample of 22 offshore oil-workers took part in a simulated escape exercise. The sample yielded...

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Statistics

A sample of 22 offshore oil-workers took part in a simulatedescape exercise. The sample yielded an average escape time of 388.7min. and standard deviation of 22.4 min. The 95% confidenceinterval for the true average of escape time is:
(379.34    ,    398.06)
(378.768    ,    398.632)
(380.482    ,    396.918)

Answer & Explanation Solved by verified expert
3.8 Ratings (535 Votes)
Solution Given that 3887s 224n 22degrees of freedom df n 1 22 1    See Answer
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