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In 1989,Kent motors produced 15,000 Tractors. During the year, 800 tractors were inspected and 5.2 defects per tractor (on average) were identified . What control chart would you use during production, including the control limits? Why use this chart? What is the probability of finding as many as 3 defects on a tractor? What is the probability that one would find exactly 7 defects on a tractor? What is the probability of finding exactly 5.2 defects on a tractor? Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
Probability that the entire batch will be rejected?
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.
(a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
For monthly volume of 300 tables, find out total cost, total revenue and profit.
Suppose it costs $25 per student for the administrators to provide the course materials.
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
Use this information to construct a probability table, and then calculate each of the following probabilities: P(foreign car)
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
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