Question

In: Operations Management

Twenty samples were taken from a cable-weaving machine while it was being operated under closely controlled...

Twenty samples were taken from a cable-weaving machine while it was being operated under closely controlled conditions. The number of defects per 100 meters for the samples is recorded below: 4, 4, 5, 3, 6, 2, 2, 4, 5, 3, 4, 2, 3, 2, 4, 5, 5, 7, 5, 3. Determine 3? control limits for monitoring defects of the process.

Solutions

Expert Solution


Related Solutions

Twenty samples of n = 200 were taken by an operator at a workstation in a...
Twenty samples of n = 200 were taken by an operator at a workstation in a production process. The number of defective items in each sample were recorded as follows Sample number of defectives Sample number of defectives 1 12 11 16 2 18 12 14 3 10 13 12 4 14 14 16 5 16 15 18 6 19 16 20 7 17 17 18 8 12 18 20 9 11 19 21 10 14 20 22 1- develop...
1.Water samples were taken from water used for cooling as it was being discharged from a...
1.Water samples were taken from water used for cooling as it was being discharged from a power plant into a river. It has been determined that as long as the mean temperature of the discharged water is at most 150 F, there will be no negative impact on the river's ecosystem. To investigate whether a plant is in compliance with regulations that prohibit a mean discharge water temperature above 150 F, researchers took 50 water samples at randomly selected times...
Twenty samples with 100 units each were taken; with the following number of defectives in each...
Twenty samples with 100 units each were taken; with the following number of defectives in each respective sample: 11, 2, 7, 5, 6, 7, 8, 5, 3, 6, 4, 3, 5, 6, 2, 5, 0, 9, 10, and 8. Calculate the center line, upper control limit, and lower control limit for a 3s p-chart. (RE: As your starting point, recall that p-charts represent percentages of defects for samples.) Plot the points on the chart. Comment on whether the process is...
One hundred blood samples were taken from 100 individuals. All of the blood samples were run...
One hundred blood samples were taken from 100 individuals. All of the blood samples were run through two machines to determine if the machines were testing samples appropriately. We expect that both machines should yield similar results. Below are the results of the analysis. Assume there are 100 sample and they are normal. Are the two machines similar? Should we check into whether one machine should be replaced? Show all of your work. Beckman Machine Coulter Machine 3. 4. 5....
Samples of 36 parts are taken from a manufacturing process that produces machine parts with a...
Samples of 36 parts are taken from a manufacturing process that produces machine parts with a mean diameter of 12.40 cm and a standard deviation of 0.06 cm. If the diameters are normally distributed, what proportion of sample means will have diameters between 12.39 and 12.41 cm?
Nine samples were taken from 2 streams, four from one and five from the other and...
Nine samples were taken from 2 streams, four from one and five from the other and the following data were obtained. Pollution lever in stream 1: ppm Pollution level in stream 2: ppm 16 9 12 10 14 8 11 6 Someone claimed that the data proved that stream 2 is less polluted than stream 1. Someone else asked the following questions: When were the data collected? Were the data collected all in one day or on different days? Were...
Five samples of size 4 were taken from a process. A range chart was developed that...
Five samples of size 4 were taken from a process. A range chart was developed that had LCLr = 0 and UCLr = 2.50. Similarly, an average chart was developed with the average range from the five samples, with LCLx = 15.0 and UCLX = 24.0. The ranges for each of the five samples were 1.75, 2.42, 2.75, 2.04, and 2.80, respectively. The values of the sample average for each sample were 19.5, 22.3, 17.4, 20.1, and 18.9, respectively. What...
- Ten samples were taken from the normally distributed population with a variance of 64. Test...
- Ten samples were taken from the normally distributed population with a variance of 64. Test whether the data are sufficient evidence to conclude that the population mean is greater than 45 at a 10 per cent significance level, as follows (58, 62, 45, 50, 59, 65, 39, 40, 41, 52). 1. Set a hypothesis 2. Ask for rejection region. 3. Obtain the Test Statistics 4. Find a p-value.
Two random samples were drawn from members of the U.S. Congress. One sample was taken from...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from members who are Democrats and the other from members who are Republicans. For each sample, the number of dollars spent on federal projects in each congressperson's home district was recorded. Dollars Spent on Federal Projects in Home Districts Party Less than 5 Billion 5 to 10 Billion More than 10 billion Row Total Democratic 6 16 23 45 Republican 11 17 19 47 Column...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from...
Two random samples were drawn from members of the U.S. Congress. One sample was taken from members who are Democrats and the other from members who are Republicans. For each sample, the number of dollars spent on federal projects in each congressperson's home district was recorded. Dollars Spent on Federal Projects in Home Districts Party Less than 5 Billion 5 to 10 Billion More than 10 billion Row Total Democratic 9 11 25 45 Republican 11 19 17 47 Column...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT