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Smooth the data set cars from Problem 1 using Cleveland's smoother. Choose a reasonable value for the span using trial and error. Why does this span appear to be a good choice?
Comment on the graphical comparison of the estimate using the trial and error span with the estimates found using the span chosen by the two cross-validation validation methods (aicc and gcv).
Problem 1
The data set cars from Ezekiel (1930) contains stopping distances for various speeds. Smooth the data using Friedman's smoother by choosing your own value of the span. Use dist as the dependent (response) variable and speed as the independent (predictor) variable. Using trial and error, what seems to be a reasonable span? Comment on the graphical comparison between the estimate using your choice of span with the estimate using the span chosen by cross-validation.
Perform the chisquare test for a uniform distribution. At α = .05, does this sample contradict the assumption that sales are the same for each beverage?
The system will run successfully if any 3of them are functioning. Find the reliability of the system if the mission time is 8 hours. The life distribution of each component is given in the table.
Assume that 12 percent of adults in this country have filed for bankruptcy at some point in their life.
1.an instructor wanted to construct a confidence interval for the mean gpa of the students in his class. he used the
Suggest some differences between online and classroom students that might explain why online students do better.
What concepts and constructs would you use to study this phenomenon? How might the concepts or constructs relate to explanatory hypotheses? Explain.
A certain medication is known to increase the pulse rate of its users. The standard deviation of the pulse rate is know to be 4 beats per minute. A sample of 40 users had an average pulse rate of 98 beats per minute. Find the 95% confidence interv..
What is the test statistic? What are the critical values? What is the P-value? What is the conclusion? Can a hypothesis test be used to "prove" that the rate of green-flowered peas is 25%, as claimed?
Suppose that a random variable X has a Binomial distribution with parameters n and p. Find E[(1/3)^X].
Determine the values on the 3-sided die so that the outcome probabilities for rolling the two dice described above match exactly the outcome probablities for rolling two standard (6-sided) dice.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
1. Apply one of the leadership theories from the course text to the organization. Explain how the theory works and include an example. 2. Explain the effect of power and influence that leaders have on followers in the organization. Are the follow..
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