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Most individuals are aware of the fact that the average annual repair cost for an automobile depends on the age of the automobile. A researcher is interested in finding out whether the variance of the annual repair costs also increases with the age of the automobile. A sample of 26 automobiles 4 years old showed a sample standard deviation for annual repair costs of $170 and a sample of 25 automobiles 2 years old showed a sample standard deviation for annual repair costs of $100.
a. State the null and alternative versions of the research hypothesis that the variance in annual repair costs is larger for the older automobiles.
b. At a .01 level of significance, what is your conclusion? What is the p-value? Discuss the reasonableness of your findings.
Adding four or more flights to existing routes, it will have to add two pilots also flight attendants.
q1. do protectionist policies benefit producers consumers workers or the government? explain. explain how the buy
Suppose a nation picks 1000 young adults at random to serve in the army. Illustrate what information do you need to determine the cost of using these people in the Army.
Here are only some stars to fully staff every team, but there are enough for a few to be on each team if an owner decided to hire them.
Johnny has allocated $30 toward coffee and tea and feels that coffee and tea are perfect substitutes. Due to differences in caffeine levels, his MRS of tea for coffee equals 2.
Determine one possible combination of government spending increases and tax increases that would accomplish the same goal without changing the amount of outstanding debt.
If combination of rational expectation and perfectly competitive markets , a decrease in aggreage demand will lead to? A. A small decrease in real GDP B. No change in real GDP C.
Using the travel cost method, evalute the annual active use value of this area to the people living in these cities.
After doing a Chi-Square test ,you decided that failures are normally distributed ,with mean failure of 50,000 miles and a standard deviation of 10,000 miles. Concluder eliability of tires.
The demand for MICHTEC's products is related to the state of the economy.
The investors in exercise 2 are surprised by firm's performance in year 5. Instead of being $20 million, the firm's profits are $40 million. What happens to firm B's stock price in year 6 and 7?
If the company will sell the number of units obtained in part d, and wants to maintain the same level of profit as last year, what will its new price have to be?
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