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1. Reacting to a skeptical reader who doubts that so-called wine connoisseurs can really tell the differ- ence between cheap and expensive wines, the dining editor of a city newspaper sets up a test in which each of five connoisseurs is asked to taste three unidentified wines, then rate each one on a scale of 1 ("poor") to 10 ("excellent"). Unknown to the raters, wine 1 is $1.50 per gallon Elderberry, wine 2 is $8 per liter Rhine, and wine 3 is $35 per liter Cabernet Sauvignon. Their ratings are in file XR14083. Considering the wine categories as "treatments" and the tasters as "blocks," and using the 0.05 level of significance, advise the dining editor as to how to respond to this reader when he writes his next column dealing with wine. Identify and interpret the p-value for the test.
2. Five computer operators have been asked to rate four different workstation arrangements in terms of comfort with 1 5 very uncomfortable to 10 5 very comfortable. Their ratings are in file XR14084. At the 0.05 level, could the workstation arrangements be equally comfortable? Identify and interpret the p-value for the test.
3. The weights (in ounces) of the first 34 units in a production run of cast-iron flywheels are in fileXR14085. Using the 0.10 level of significance, test the randomness of this sequence of measurements. Identify and interpret the p-value for the test.
4. Apply either the chi-square or the Kolmogorov- Smirnov test for normality to the data described in Exercise 14.85. At the 0.05 level of significance, could the data have come from a normal population?
Reliable Furniture is a family business that has been selling to retail customers in the Chicago area for many years. They advertise extensively on radio and TV, emphasizing their low prices and easy credit terms.
Develop a hypothesis to investigate this problem based on the claim of the heat pump manufacturer
in a poll respondents were asked whether they had ever been in a car accident. 471 respondents indicated that they had
a recent article reported that there are approximately 11 minutes of actual playing time in a typical national football
Delphi Leasing Company leases a new machine that has a cost and fair value of $225,000 to Lindy Corporation on a 5-year noncancelable contract.
Assuming both assertions are correcting and assuming normal distributions, which review book is more likely to result in an SAT gain over 60 points?
a professor in the school of business wants to investigate the prices of new textbooks in the campus bookstore and the
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the..
a random sample of 70 needles was taken from a medical manufacturing facility and 24 were found to be defective.
Your population mean has always been 9 customers per hour. The sample standard deviation is 4. The sample size is 25. The sample mean is 8.
ABC Trucking Company purchased 15 trucks at the same time to start their business. 5 Trucks were purchased from Peterbilt, 5 from Freightliner, and 5 from Kenworth.
All standard IQ test scores are normally distributed and are set up so that the mean score is 100. However, the standard deviation differs from test to test.
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