In a random sample of 85 automobile engine crankshaft bearings,

In a random sample of 85 automobile engine crankshaft bearings,

In a random sample of 85 automobile engine crankshaft bearings, 10 have a surface finish roughness that exceeds the specifications. Does this data present strong evidence that the proportion of crankshaft bearings exhibiting excess surface roughness exceeds 0.10? State and test the appropriate hypotheses using a = 0.05.

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