94. If he uses and lower control limits of 520 and 480 hours, on what sample(s) (if any) does service life appear to be out of control? A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each: 95. What is the sample mean package weight for Thursday? 96. What is the mean of the sampling distribution of sample when this process is under control? 97. What is the standard deviation of the sampling distribution of sample means for whenever this process is under control? 98. If he uses upper and lower control limits of 22 and 18 ounces, what is his risk (alpha) of concluding this process is out of control when it is actually in control (Type I error)?
94. If he uses and lower control limits of 520 and 480 hours, on what sample(s) (if any) does service life appear to be out of control? A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each: 95. What is the sample mean package weight for Thursday? 96. What is the mean of the sampling distribution of sample when this process is under control? 97. What is the standard deviation of the sampling distribution of sample means for whenever this process is under control? 98. If he uses upper and lower control limits of 22 and 18 ounces, what is his risk (alpha) of concluding this process is out of control when it is actually in control (Type I error)?
Test%20Bank%20for%20Operations%20Management,%2010th%20Edition%20William%20Stevenson%20%20.docx