Quality Associates Essay Example for Free

Quality Associates EssayQuality Associates, a consulting firm, advises its clients about sampling and statistical procedures that can be used to control their manufacturing processes. In particular application, a client gave Quality Associates a take in of 800 observations taken during a time in which that clients process was operating satisfactorily.The sample threadb be deviation for these data was 0.21 hence with so much data, the population standard deviation was fabricated to be 0.21. Quality Associates then suggested that random samples of size 30 be taken periodically to monitoring device the process on an ongoing basis. By analyzing news samples, the client could quickly learn whether the process was surgical process satisfactorily.When the process was not unconscious process satisfactorily, corrective action could be taken to eliminate the problem. The design precondition indicated the mean for the process should be 12. The hypothesis test suggested by Quality As sociates follows. Corrective action ordain be taken any time is rejected.The dataset Quality.sav contains each of four samples, each of size 30, collected at hourly intervals during the first day of operation of the new statistical control procedure. Managerial report1. drive a hypothesis test for each sample at the 0.01 level of logical implication and determine what action, if any, should be taken. Provide the test statistic and the p-value for each test.2. Compute the standard deviation for each of the four samples. Does the assumption of 0.21 for the standard deviation appear reasonable?3. Compute limits for the sample mean around such that, as recollective as, a new sample mean is within those limits, the process will be considered to be operation satisfactorily. If exceeds the upper limit or if below lower limit, corrective action will be taken. These limits are referred to as upper and lower control limits for quality purposes.4. Discuss the implications of changing the level of significance () to a larger value. What mistakes or error (type I or type II error) could increase if the level of significance is increased?