Quality Associates, Inc., a consulting firm, advises its clients about sampling and statistical procedures that can be used to control their manufacturing processes. IN one particular application, a client game quality associates a sample of 800 observations taken during a time in which that client's process was operating satisfactorily. The sample standard deviation for there data was .21 ; hence, with so much data, the population standard deviation was assumed to be .21. Quality associates then suggested that random samples of size 30 be taken periodically to monitor the process on an ongoing basis. BY analyzing the new samples, the client could quickly learn whether the process was operating satisfactorily. when the process was not …show more content…
Provide the test statistic and p-value for each test.
2) Compute the standard deviation for each of the four samples. Does the assumption of .21 for the population standard deviation appear reasonable?
3) Compute limits for the sample mean X around μ=12 such that, as long as a new sample mean is within those limits, the process will be considered to be operating satifactorily. If X exceeds the upper limit or if X is below the lower limit, corrective action will be taken. These limits are refferred to as upper and lower control limits fro quality control purposes.
4) Discuss the implications of changing the level of significance to a larger value. What mistakes or error could increase if the level of significance in
13. Which of the following characteristics makes it EASIER to measure the quality of a service, relative to that of a product or facilitating good?
So, we should reject the null hypothesis H0. At a 0.05 level of significance level, we conclude that there is a significant difference between the average height for females and the average height for the males.
2. In order to determine the average amount spent in November on Amazon.com a random sample of 144 Amazon accounts were selected. The sample mean amount spent in November was $250 with a standard deviation of $25. Assuming that the population standard deviation is unknown, what is a 95% confidence interval for the population mean amount spent on Amazon.com in November?
"Generally, a plaintiff seeking to pierce the corporate veil must show that complete domination ' was exercised over a corporation with respect to the transaction attacked, ' and that such domination was used to commit a fraud or wrong against the plaintiff which resulted in plaintiff’s injury '" (Williams v Lovell Safety Mgt. Co., LLC, 71 AD3d
A process that monitors standards by take measurements and corrective action as needed. It is in control when only variation is natural, if variation is assignable then discover cause eliminate it. Take samples to inspect/ measure- reduce inspection time, reduce opportunity of bad quality. Control charts graph of process data over time-show natural and assignable causes. Control charts for variable data (characteristic that is measured, length,height, etc) are X-chart (average) and R-chart (range)must use x and r to get correct results. central limit theorem follow normal curve. When we know . When we don’t know . Control charts for attributes (categorical-defective, good/bad) P-chart (percent) or C-chart
10. Dan hires Eve to perform at Dan 's Club, but Eve later breaches the agreement to accept a higher-paying job at First Star Arena. Dan files a suit gainst Eve. The court will most likley: award damages to Dan.
Because the p-value of .035 is less than the significance level of .05, I will reject the null hypothesis at 5% level.
Testing allows the p-value that represents the probability showing that results are unlikely to occur by chance. A p-value of 5% or lower is statistically significant. The p value helps in minimizing Type I or Type II errors in the dataset that can often occur when the p value is more than the significance level. The p value can help in stopping the positive and negative correlation between the dataset to reject the null hypothesis and to determine if there is statistical significance in the hypothesis. Understanding the p value is very important in helping researchers to determine the significance of the effect of their experiment and variables for other researchers
BIS did not breach duty of care because according to "N.Y. GOB. LAW 18-105: NY Code -Section 18-105: Duties of skiers" 10-11, each skier shall have the duty not to willfully stop on any slope or trail where such stopping is likely to cause a collision with other skiers or vehicles and to yield to other skiers when entering a trail or starting downhill. Craig neglected his duty to both.
Elizabeth Blackwell showed herself as a dedicated and diligent doctor during five years of work in Neurological Associates, and made a significant contribution to the profit margin of the partnership. The partners were delighted with hiring Blackwell in 2005 and they introduced her to medical physicians at a conference. But the referral base Blackwell went through was not the result of that investment by the partnership but instead it was the evidence of her professionalism in neurological sphere.
(If the company produce the BB first, the company will buy 4000 labor hours, and it will use 2500 for BB and the remaining hours to produce WRM = 1500.
Quality Associates, Inc., a consulting firm advises its clients about sampling and statistical procedures that can be used to control their manufacturing processes. In one particular application a client gave Quality Associates a sample of 800 observations taken during a time in which the client’s process was operating satisfactorily. The sample standard deviation of this data was 0.21; hence with so much data, the population standard deviation was assumed to be 0.21. Quality Associates then suggested that random samples of size 30 be taken periodically to monitor the process on an ongoing basis. By analyzing the new samples, the client could quickly learn whether the process was operating satisfactorily. When the process was not operating satisfactorily, corrective action could be taken to eliminate the problem. The design specification indicated the mean for the process should be 12. The hypothesis test suggested by Quality Associates follows.
2. If management wishes to use smaller samples of 16 observations calculate the control limits covering the 95% confidence interval. (Round calculations to 2 decimal
2. If management wishes to use smaller samples of 16 observations calculate the control limits covering the 95% confidence interval. (Round calculations to 2 decimal
The problem is simple and fundamental. Human error is an inevitable part of the process of collecting statistical data. This is consistently overlooked in companies that utilize manual SPC[1] (statistical process control) for their manufactured goods. To ensure the