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Eleven tires were each measured for tread wear by two methods, one based on weight and the other on groove wear. Here are the data (tire_data.txtPreview the document) in thousands of miles:
Weight 30.5 30.9 31.9 30.4 27.3 20.4 24.5 20.9 18.9 13.7 11.4
Groove 28.7 25.9 23.3 23.1 23.7 20.9 16.1 19.9 15.2 11.5 11.2
Does it appear the two methods, on the average, give different results? Set up the hypotheses. Indicate whether you are going to use 2-sample t-test or paired t-test for the problem. If you use 2-sample t-test, will you use pooled or non-pooled variances? What conditions will you check before you perform the test?
Weight Groove
30.5 28.7
30.9 25.9
31.9 23.3
30.4 23.1
27.3 23.7
20.4 20.9
24.5 16.1
20.9 19.9
18.9 15.2
13.7 11.5
11.4 11.2
Plotting the supply of labor In Denver, 140 people are willing to work an hour as hostesses if the wage is $10 per hour. For each additional $5 that the wage rises above $10, an additional 35 people are willing to work an hour. What is one explanatio..
Consider a large country importing good X in the international market. The country is large enough to influence the international price for good X. Let the initial international price of good X be $100, where the country imports 100 units and produce..
Discuss some of the challenges involved in integrating forward and reverse supply chains.
The market of natural gas is described by the following supply and demand equations:
Calico Computing is a firm that sells software integration and infrastructure packages to schools and universities. Georgia Redding is an inside sales representative with Calico Computing. As an inside sales representative, her sales presentations ar..
Show graphically and explain what happens in the Cars market, include effects on Price and Quantity. What would happen to the equilibrium price and quantity of cars if the price of steel increased?
Educational reforms begin to significantly raise test scores of graduating high school seniors in the United States, and they enter the workforce with improved reading, math, and reasoning skills. What effect would this have on aggregate supply? Ques..
Compute GDP for Joe using both the product and income approaches and show how they must agree.
A monopoly sells to consumers with inverse demand given by p(Q) = 100 − Q and technology TC(Q) = 5Q. Characterize the firm’s profit-maximing behaviour when they are permitted to set a two-part tariff.
There are many venture capital syndicates that consist of a few (say, eight or ten) wealthy people who combine to make investments in small
Suppose you were given a choice to select from a menu of items in your employee benefits package. The menu might include medical coverage ($1500 deductable), life insurace equal to a year's salary, vacation time based on length of employment with the..
New actuator element technology enables engineers to simulate complex computer-controlled movements in any direction. If the technology results in cost savings in the design of amusement park rides, what is the future worth in year 5 of savings of $7..
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