In what percent of crashes were the causes not determined

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Plane crashes. An investigation compiled information about recent nonmilitary plane crashes (www. planecrashinfo.com). The causes, to the extent that they could be determined, are summarized in the table.

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a) Is it reasonable to conclude that the weather or mechanical failures caused only about 20% of recent plane crashes?

b) In what percent of crashes were the causes not determined?

c) Create an appropriate display for these data.

Reference no: EM131379754

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