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General Motors and Ford have produced cars with the same size diesel engine. We are interested in determining whether or not there is a significant difference in the gas consumption of the two models of automobiles. A random sample of 7 cars from each manufacturer is selected, and 7 drivers are selected to drive one of GM and one of Ford cars for a specified distance implying that driver 1 drove the first GM car and the first Ford car, driver 2 drove the second GM car and the second Ford car, driver 3 drove third GM car and the third Ford car, and so on. The MPG (miles per gallon) data is recorded and summarized in the following table:
Driver GM(MPG) FORD(MPG)
1 29 26
2 25 23
3 26 27
4 25 25
5 22 24
6 24 23
7 27 25
Which of the following is a correct statement if the objective of the test of hypothesis is to determine whether there is a difference in the gas consumption of the two models?
Select one:
A. Ho: GM = Ford
B. Ho: D = 0 (where D is the mean population difference)
C. Ho: GM Ford
D. Ho: D 0
E. None of the above answers is correct.
a traffic control engineer reports that. 75 of the vehicles passing through a checkpoint are from within the state.
an automated blood-pressure machine correctly classifies 87 of hypertensives as having hypertension high blood pressure
We related EVPI to the value of an envelope that contains the true ultimate outcome. This concept can be extended to "less than perfect" information.
Mention respectively: 1- Problem 2- Symptoms 3- Business Impacts 4- Recommendation/Solutions
Create a histogram of the time until first failure for this type of disc player.- Then find a 95% confidence interval for the mean time until failure for this type of disc player.
Write a table that gives the cumulative probability distribution for X.- What is the value of P(X ≤ 2), the probability that a randomly selected person ate two or fewer meals yesterday?
Compute the expected rework cost for each problem separately. For example, the expected rework cost for "broken case" is 0.046.88.
Construct an appropriate control chart and comment on the process assuming a type I error rate of 0.005. What would the control limits be for a type I error rate of 0.05? What factors would influence your selection of the type I error rate?
Assume you have the following data: Ho: u = 2,450, S = 400, n = 100, and X = 2,300. Conduct a hypothesis test at the .01 significance level.
A total of 183 residents show up for a public hearing on the proposal, and a show of hands finds only 31 in favor of the prison project.
In a national wide survey a researcher expects 30 percent of the population will agree with an value statement. He wishes to have less than 2% error and 95% confident. What sample size is needed?
The researchers concluded that there is ‘‘significant negative correlation'' between the number of online courses and weekly quiz grade. Do you agree?
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