Schadek Silkscreen Printing, Inc., purchases plastic cups on which to print logos for sporting events, proms, birthdays, and other special occasions. Zack Schadek, the owner, received a large shipment this morning. To ensure the quality of the shipment, he selected a random sample of 530 cups. He found 22 to be defective. a. What is the estimated proportion defective in the population? (Round the final answer to 3 decimal places.) Estimated proportion defective 0.042 b. What are the endpoints of a 90% confidence interval for the proportion defective. (Round the final answers to 3 decimal places.) Endpoints c. Zack has an agreement with his supplier that he is to return lots that are 10% or more defective. Should he return this lot? No, lot not 10% defective.Furniture Land surveyed 680 consumers and found that 458 were enthusiastic about a new home decor it plans to show in its store in High Point. Construct the 99% confidence interval for the population proportion. (Round the nal answers to 3 decimal places} Confidence interval for the population proportion is and |_ A gift shop advertises thatthey stock 520 items that a e priced under $50. A sample of Fortyfive items are randomly selected and the sample mean price is $40, with a sample standard deviation of 7. Develop a 98% confidence interval for the population mean price. (Round the final answers to 2 decimal places} The confidence interval is between | | and