A manufacturer claims that in a process of producing drill bits, only 2.5% of the bits are
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A manufacturer claims that in a process of producing drill bits, only 2.5% of the bits are dull. Test the claim against the alternative that more than 2.5% of the bits are dull, using a sample of 400 bits containing 17 dull ones. Use α = 5%.
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K 2 classes dull sharp Expected values 10 dull 390 sharp 1 degree of freedom hence ...View the full answer
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