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A researcher for an automobile manufacturer wishes to see if the ages of automobiles are equally distributed among three categories:less than 3 years old, 3 to 7 years old, and 8 years or older. A sample of 30 adult automobile owners is selected, and the results are shown. At alpha= 0.05 can it be considered that the ages of the automobiles are equally distributed among the three categories? what would the results suggest to a tire manufacturer?
By letting the period be one month, one has D = 100, Cu = 2.5, Ch= 0.50, Cr = 3.50, Cs= 0.20 and L = 0.75. What is the optimal inventory policy and the total cost of the system under the optimal policy?
Develop two-null hypothesis tests to ascertain if there are any statistical variances in the averages of bus route times and any statistical variance among the average performance of the bus drivers. Use the following information to conduct the te..
State a question that can be answered in a "binomial" manner, such as Do you normally read the front page of a newspaper at least 4 times a week?
A local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.7 minutes with a standard deviation of 0.8 minute. If α = 0.05, test the store's claim.
During the 2004 election year, new polling results were reported daily. In an IBD/TIPP poll of 910 adults, 503 respondents reported that they were optimistic about the national outlook, and The President's leadership index jumped 4.7 points to 55...
Does there seem to be any difference in the effects of the antibiotics on clearance of otitis media? Express your results in terms of relative risk (RR). Consider separated analyses for unilateral and bilateral cases. Also consider and analysis co..
Then, give two examples of correlation which are evaluated in a business environment and discuss the decision made by evaluating the correlation.
A permutation resample for a two-sample test
probability of 0.31 that it is dominant. There is also a probability of 0.22 that a gene is type B and it is dominant. What is the probability that a gene is of type A?
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
Determine the probability that at most 4 fish will be killed?
Patient does not have disease occurs 1% of the time. If a randomly selected individual is positive what is the probability that the individual has the disease?
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