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The management of ABC Paper Corporation wants to determine whether there is a significant difference in the thickness of papers produced at their two existing plants. The following data has been accumulated for this test. The degrees of freedom (df) for this problem are given to be df = 80.
Plant 1 Plant 2
Sample Mean 30.8 30.0
Sample Standard Deviation 8.0 9.0
Sample Size 55 41
(The Von Neumann device) Suppose that one of two people is to be randomly chosen, with equal probability, to attend an important meeting.
For a regional hospital in a metropolitan area, what are some of the internal failure and external failure costs? How might they be reduced?
assume that the anova assumptions are verified. state the rejection rule to test whether the population mean differs
In this assignment, you are expected to harmonize and make use of the concepts we have learned since the beginning of the term to come up with a proper statistical analysis of a topic of your choice.
A technician services machines as companies in the Phoenix area. Depending on the type of malfunction, the service call can take exactly 1, 2, 3, or 4 hours. The different types of malfunctions occur at the same frequency.
using the data below identify the confidence interval for the mean based on a 95 confidence level. assume that the
A sample of 212 commercial businesses was surveyed for recycling one commodity; a commodity here means any one type of recyclable material such as plastic.
In a tensile test on a metal specimen, true strain = 0.08 at a stress = 265 MPa. When the true stress = 325 MPa, the true strain = 0.27.
Law enforcement 2004. Some federal employees have the authority to carry firearms and make arrests. Obviously, some danger is associated with these jobs.
Translate this into a statistical hypothesis-testing problem and carry out the test. Be sure to give the null and alternative hypotheses, the value of the test statistic, the p-value, and your conclusions.
suppose that gmat scores are normally distributed with a mean of 530 and a standard deviation of 100. a school only
The following is a random sample of the wealth, in billions of U.S. dollars, of individuals listed on the Forbes "Billionaires" list for 2007.- Construct a 90% confidence interval for the average wealth in $ billions for the people on the Forbes li..
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