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In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of 6 students were given the exam before and after taking the course. The results are shown below.Let d = Score After - Score Before.
Score ScoreStudent Before the Course After the Course1 83 872 89 883 93 914 77 77 5 86 936 79 83
a. Compute the test statistic.b. At 95% confidence using the p-value approach, test to see if taking the course actually increased scores on the driving exam.
Brief description of the real-world situation or problem you selected to address, the independent and dependent variables you would study
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
She figures that each box costs $ 2.59 plus $ 0.21 shipping and handling, which totals $ 2.80, then she adds $ 0.70 profit to each box and sells it for $ 3.50. Do you think this is a good pricing strategy? How would it compare to marking up by a p..
Create a set of data that can be modeled as a polynomial function. Please provide a reference to the data. Plot the data using Microsoft Excel including the equation for the fit.
A business owner decides to use a binomial distribution to solve one of his problems. He knows there is a 60 percent probability that he will sell one of his Red Oak floors to any customer who comes into his shop and views the wood.
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
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For an examination in which grades of 70 and 88 correspond to standard scores of -0.6 and 1.4 respectively. Find:
Is there evidence to suggest that the process average differs from the target value?
Expand the above table to show the change in Ms A's investment portfolio over the year, and construct a suitable diagram to illustrate that information.
The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture.
The claim that ""40% of those persons who retired from an industrial job before the age of 60 would return to work if a suitable job was available" is to be investigated at the 0.02 level of risk.
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