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A panel of economists provided forecasts of the U.S. economy for the first six months of 2007 (The Wall Street Journal, January 2, 2007). The percent changes in the gross domestic product (GDP) forecasted by 30 economists are as follows. 2.6 3.1 2.3 2.7 3.4 0.9 2.6 2.8 2.0 2.4 2.7 2.7 2.7 2.9 3.1 2.8 1.7 2.3 2.8 3.5 0.4 2.5 2.2 1.9 1.8 1.1 2.0 2.1 2.5 0.5
a. What is the minimum forecast for the percent change in the GDP? What is the maximum?
b. Compute the mean, median, and mode.
c. Compute the first and third quartiles.
d. Did the economists provide an optimistic or pessimistic outlook for the U.S. economy? Discuss.
The probability that he passes both finals is .60. What is the probability that the student will pass at least one of these final examinations?
Develop the management-research question hierarchy that will help you to develop a specific proposal.
The 2010 Chevrolet Camaro with an eight-cylinder engine and automatic transmission has a combined gas mileage of 19 mpg. What percent of all vehicles have better gas mileage than the Camaro?
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
In a large department store a customer complaints office handles an average of six complaints per hour about the quality of service.
If there are no large cost disadvantages, the data suggest that we should proceed. B) Technical issue: Does the treatment effect depend on the past average sales?
Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.
Plot the data on U.S. general aviation shipments (b) Describe the patterns and discuss possible causes.(c) Would a fitted trend be helpful? Explain. (d) Make a similar graph for 1992-2003 only.
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming equal variances. Interpret these results. Is the difference in mean scores large enough to be important?
Determine the mean annual amount spent on household consumption per family with a sample of 100 families, an average amount of $8,000 spent, and if the population standard deviation is $500,
For how many of the 100 days was the number of paying customers within three standard deviations of the mean? Explain how you determined your answer.
According to a survey 41 % of major US companies electronically monitor their employees. Suppose that 5 such companies are selected independently and at random.
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