For each shipment of parts, a manufacturer wants to accept only those shipments with at most 10% defective parts. A large shipment has just arrived. A quality control manager randomly selects 55 of the parts from the shipment and finds that 6 parts are defective. Use a .05 level of significance to conduct the appropriate hypothesis test. Which of the following conclusions is true? there is insufficient evidence at alpha = 0.05 to reject the entire shipment there is sufficient evidence at alpha = 0.05 to reject the entire shipment the population proportion standard deviation is needed to do the test because of the large sample size the test cannot be done since the population proportion distribution is not normal
For each shipment of parts, a manufacturer wants to accept only those shipments with at most 10% defective parts. A large shipment has just arrived. A quality control manager randomly selects 55 of the parts from the shipment and finds that 6 parts are defective. Use a .05 level of significance to conduct the appropriate hypothesis test. Which of the following conclusions is true?
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there is insufficient evidence at alpha = 0.05 to reject the entire shipment |
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there is sufficient evidence at alpha = 0.05 to reject the entire shipment |
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the population proportion standard deviation is needed to do the test because of the large sample size |
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the test cannot be done since the population proportion distribution is not normal |
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