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Question # 3. A contract with a parts supplier calls for no more than 0.04 defects...
A manufacturer is comparing shipments of machine parts from two suppliers. The parts from Supplier A...
A manufacturer is comparing shipments of machine parts from two suppliers. The parts from Supplier A are less expensive, but the manufacturer is concerned they may be of lower quality than those from Supplier B. 700 parts were selected from Supplier A and 121 of them were found to be defective. 1200 parts were selected from Supplier B and 180 of them were found to be defective. Can we conclude at a 1% significance level that Supplier A has a...
5.45The Quinte Corporation manufactures parts for electronic consumer products. One contract calls for 95% of all...
5.45The Quinte Corporation manufactures parts for electronic consumer products. One contract calls for 95% of all parts to pass a certain test. When shipping a lot of 2500 or more parts, the Quinte Corporation adopts the following plan. Select a random sample of 35 parts from the shipment and determine how many pass the test. If 4 or more parts fail the test, the lot is considered to be unacceptable. If 0 or 1 parts fail, the lot is approved...
3) 3) A supplier of digital memory cards claims that no more than 1% of the...
3) 3) A supplier of digital memory cards claims that no more than 1% of the cards are defective. In a random sample of 600 memory cards, it is found that 3% are defective, but the supplier claims that this is only a sample fluctuation. At the 0.01 level of significance, test the supplier's claim that no more than 1% are defective.
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducte...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with...
An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with major defects prior to using the potatoes to make potato chips. Unless there is clear evidence that this proportion, p, is less than 0.10, he will reject the shipment. He will test the hypotheses H 0 : p = 0.10 , H a : p < 0.10 . He selects an SRS of 100 potatoes from the over 2000 potatoes on the truck. Suppose...
Rate Dining Servare emparing two lotet mupplies for next vear's King Neptune Night Supplier i dins...
Rate Dining Servare emparing two lotet mupplies for next vear's King Neptune Night Supplier i dins that there is a variability in the weights of their lesbiters than is the weights of Supplier oftens Supplier claim that the true average weight of these lobsters exceeds that of Supplier by more than 0.25 pounds Two random samples of 16 and ny - 25 are weleted from each supplierre spectively. Each beter's chistered with the following summary values (pounds) JMP wormal qutile...
A cereal company claims that the mean weight of the cereal in its packets is more...
A cereal company claims that the mean weight of the cereal in its packets is more than 14 oz. The weights (in oz) of the cereal in a random sample of 8 cereal packets are listed below. You may assume the sample data comes from a population that follows a normal distribution. Using a 0.05 significance level, test the companies claim. State the null hypothesis H0. State the alternative hypothesis H1. What is the test statistic? State the alpha level....
Are U.S. adults aged 18-29 more likely to use Facebook than U.S. adults aged 30-49?” The...
Are U.S. adults aged 18-29 more likely to use Facebook than U.S. adults aged 30-49?” The Pew Research Center conducted a survey with a random sample of U.S. adults in January 2018.2 Out of 351 adults aged 18-29, 282 used Facebook. Out of 525 adults aged 30-49, 410 used Facebook. a. Compute the value of the statistic of interest. b. Are the appropriate conditions met to conduct a hypothesis test using the z-distribution? Explain. c. Conduct a hypothesis test to...
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results...
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level...
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results...
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level...
5.45The Quinte Corporation manufactures parts for electronic consumer products. One contract calls for 95% of all parts to pass a certain test. When shipping a lot of 2500 or more parts, the Quinte Corporation adopts the following plan. Select a random sample of 35 parts from the shipment and determine how many pass the test. If 4 or more parts fail the test, the lot is considered to be unacceptable. If 0 or 1 parts fail, the lot is approved...
3) 3) A supplier of digital memory cards claims that no more than 1% of the cards are defective. In a random sample of 600 memory cards, it is found that 3% are defective, but the supplier claims that this is only a sample fluctuation. At the 0.01 level of significance, test the supplier's claim that no more than 1% are defective.
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
Rate Dining Servare emparing two lotet mupplies for next vear's King Neptune Night Supplier i dins that there is a variability in the weights of their lesbiters than is the weights of Supplier oftens Supplier claim that the true average weight of these lobsters exceeds that of Supplier by more than 0.25 pounds Two random samples of 16 and ny - 25 are weleted from each supplierre spectively. Each beter's chistered with the following summary values (pounds) JMP wormal qutile...
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