A quality control computer engineer would like to determine if a new manufacturing process will significantly reduce the proportion of defective computer chips. In a random sample of 398 computer chips manufactured using the present process, 44 were defective, while in a random sample of 417 computer chips manufactured using the new process, 29 were defective. Based upon the sample data, can the quality control engineer state the new manufacturing process is significantly better at \alpha = 5\%? Let population 1 be the computer chips manufactured using the present process and population 2 be the computer chips manufactured using the new process.
A quality control computer engineer would like to determine if a new manufacturing process will significantly...
5.3 Quality control. As part of a quality control process for computer chips, an engineer at a factory randomly samples 212 chips during a week of production to test the current rate of chips with severe defects. She finds that 27 of the chips are defective. (a) What population is under consideration in the data set? (b) What parameter is being estimated? (c) What is the point estimate for the parameter? (d) What is the name of the statistic can...
A shipment of 50,000 transistors arrives at a manufacturer plant. The quality control engineer at the plant obtains a random sample of 500 transistors and will reject the entire shipment if 10 or more of the resistors are defective. Suppose that 4% of the resistors in the whole shipment are defective. Describe the sampling distribution of the sample proportion of defective resistors, Justify your answer. What is the probability the engineer accepts the shipment? Do you believe the acceptance policy...
Partial Question 1 3/4 pts A certain process for manufacturing integrated circuits has been in use for a period of time, and it is known that 12% of the circuits it produces are defective. A new process that is supposed to reduce the proportion of defectives is being tested. In a simple random sample of 100 circuits produced by the new process, 11 were defective. Match the following: The population of interest Integrated circuits mad Parameter of interest proportion of...
0/ 4 pts Question 1 A certain process for manufacturing integrated circuits has been in use for a period of time, and it is known that 12% of the circuits it produces are defective. A new process that is supposed to reduce the proportion of defectives is being tested. In a simple random sample of 100 circuits produced by the new process, 11 were defective. Match the following: The population of interest The 11 defective circuits Parameter of interest 11%...
SamplingA manufacturing company's quality control personnel have recorded the proportion of defective items for each of 500 monthly shipments of one of the computer components that the company produces. See data below. The company doesn't have time to review all of these.(a) Use MS Excel to generate a random sample of 25 from the 500.(b) Computer the point estimate of the mean.(c) Compute a 90% confidence interval of the mean.(d) Compute a 99% confidence interval of the mean.(e) Chart the...
Do the following problems: The following are quality control data for a manufacturing process at Kensprt Chemical Company. The data show the temperature in degrees centigrade at five points in time during the manufacturing cycle. The company is interested in using quality control charts in monitoring the temperature of its manufacturing cycle. Construct an X bar and R chart and indicate what its tells you about the process. Sample X bar R 1 95.72 1.0 2 95.24 .9 3 95.38 ...
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 105 months, with a variance of 81 If he is correct, what is the probability that the mean of a sample of 70 computers would differ from the population mean by less than 1.9 months? Round your answer to four decimal places.
Question 4 (1 point) A company manufacturing computer chips finds that 8% of all chips manufactured are defective. In an effort to decrease the percentage of defective chips, management decides to provide additional training to employees. After training was implemented, a sample of 450 chips revealed only 27 defects. Using hypothesis testing we want to investigate if the additional training was effective in lowering the defect rate. Which of the following statements is true about this hypothesis test? It is...
A quality control engineer developed a control chart to maintain the weights of family size ketchup bottle (desired population median weight is 68 oz). Weights (in ounces) of 16 bottles taken at randomly selected times from the production process are as follows (data displayed in order of time of the selection): 68.2, 71.6, 69.3, 71.6,70.4, 65, 63.6, 64.7,65.3, 64.2, 67.6, 68.6, 66.8,67.9, 66.7,70.1 (a) (3 points) Do the data provide any evidence to conclude that the sample is not a...
Bob the Quality Control Engineer wishes to determine the mean mass of apples grown in Tallula's orchard. A sample of 7 randomly-chosen apples has a mean mass of 112 g with a sample standard deviation of 32 g. Using a t-distribution, find a 90% one-sided lower confidence bound on the population mean mass of apples in grams. Give your answer to one decimal place.