An engineer claims that painting the exterior of a
Chapter , Problem 9(choose chapter or problem)
An engineer claims that painting the exterior of a particular aircraft affects its cruising speed. To check this, the next 10 aircraft off the assembly line were flown to determine cruising speed prior to painting, and were then painted and reflown. The following data resulted. Cruising Speed (knots) Aircraft Not Painted Painted 1 426.1 416.7 2 418.4 403.2 3 424.4 420.1 4 438.5 431.0 5 440.6 432.6 6 421.8 404.2 7 412.2 398.3 8 409.8 405.4 9 427.5 422.8 10 441.2 444.8 Do the data uphold the engineers claim?
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