Question: A casting machine is supposed to produce units for which
A casting machine is supposed to produce units for which the standard deviation of weights is 0.4 ounces. According to the maker of the machine, it should be shut down and thoroughly examined for wear if the standard deviation becomes greater than the 0.4 ounces that has been specified. In a random sample of 30 units recently produced by the machine, the standard deviation is found to be 0.82 ounces. Given this information, and assuming a normally distributed population of weights, would you feel very secure in advising management that the machine should be shut down? Use the approximate p-value of the test for assistance in formulating your answer.
Relevant QuestionsAt the beginning of last year, a power company asked each of its industrial customers to estimate how much electricity it would require during the year. At the end of the year, the power company recorded the extent to which ...Given the information in Exercise 13.87 and data file XR13087, determine the 95% confidence interval for the population variance of the speeds of vehicles passing this location on the urban interstate. In exercise Safety ...What is the parametric counterpart to the Wilcoxon signed rank test for paired samples? Compare the assumptions involved in using the respective tests. What are some advantages and disadvantages of nonparametric testing? The Environmental Protection Agency measures city fuel economy by placing the vehicle on a laboratory dynamometer and determining the amount of fuel consumed during a standard speed-distance schedule that simulates an urban ...
Post your question