The accounting department analyzes the variance of the weekly unit costs reported by two production departments. A sample of 16 cost reports for each of the two departments shows cost variances of 2.3 and 5.4, respectively. Is this sample sufficient to conclude that the two production departments differ in terms of unit cost variance? Use α = .10.
Answer to relevant QuestionsTwo new assembly methods are tested and the variances in assembly times are reported. Use α = .10 and test for equality of the two population variances. March 4, 2009, was one of the few good days for the stock market in early 2009. The Dow Jones Industrial Average went up 149.82 points (The Wall Street Journal, March 5, 2009). The following table shows the stock price ...FlightStats, Inc., collects data on the number of flights scheduled and the number of flights flown at major airports throughout the United States. FlightStats data showed 56% of flights scheduled at Newark, La Guardia, and ...The weekly demand for a product is believed to be normally distributed. Use a goodness of fit test and the following data to test this assumption. Use α = .10. The sample mean is 24.5 and the sample standard deviation is 3. The following data were collected on the number of emergency ambulance calls for an urban county and a rural county in Virginia. Conduct a test for independence using α = .05. What is your conclusion?
Post your question