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Descriptive statistics & Confidence Interval: Oil spill

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Owing to several major ocean oil spills by tank vessels, Congress passed the 1999 Oil Pollution Act, which requires all tankers to be designed with thicker hulls. Further improvements in the structural design of a tank vessel have been proposed since then, each of which the objective of reducing the likelihood of oil spill and decrease the amount of outflows in the event of a hull puncture. To aid in this development, marine technology (Jan, 1995) reported on the spillage amount (in thousands of metric tons) and cause of puncture for 50 recent major oil spills from tankers and carriers. [Note: cause of puncture is classified as collision (C), fire/explosion (FE), hull failure (HF), or grounding (G).] SEE DATA BELOW

a- Use graphical method to describe the cause of oil spillage for the 50 tankers. Does the graph suggest that any one cause is more likely to occur than any other? How is this information of value to the design engineers?

b- Find and interpret descriptive statistics for the 50 spillage amounts. Use this information to form an interval that can be
used to predict spillage amount of the next major oil spill.


Solution Summary

The solution provides step by step method for the calculation of descriptive statistics and confidence interval. Formula for the calculation and Interpretations of the results are also included.