Change the degree of the local polynomial

Assignment Help Basic Statistics

Reference no: EM131110203

Change the degree of the local polynomial in Cleveland's method to 0 (locally constant) using the argument degree (see Comment 8). Using the cars data from Problem 1, how does changing the degree affect the estimates compared to the locally linear estimates (degree=1) from Problem 8? Change the degree to 2 (locally quadratic) and compare graphically the estimate obtained to those found using degrees 0 and 1.

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.

Problem 8

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).

Reference no: EM131110203

Questions Cloud

What type of legal issue is presented in the case : What type of legal issue is presented in the case (i.e. what is this case an example of?), How is ruling is reflective of the concepts presented in the chapter

Are there any additional losses woolrich could claim : Just before Greensburg breached the contract, it made a large shipment of furniture to Woolrich that amounted to about half the furniture that Woolrich had just ordered from Greensburg. Are there any additional losses Woolrich could claim

Find the meaning of the terms hue : find the meaning of the terms hue, saturation, and brightness (or luminance), and how these color models are related to the CMYK and Pantone color schemes.

The importance of stipulating salary in contract : Discussion: The Importance of Stipulating Salary in an Employment Contract. Have Ditcher, Quick & Hyde made Rita a valid salary offer? Why or why not

Change the degree of the local polynomial : Change the degree of the local polynomial in Cleveland's method to 0 (locally constant) using the argument degree (see Comment 8). Using the cars data from Problem 1, how does changing the degree affect the estimates compared to the locally linear..

Do you think main street fairness act will ever become law : If you were a Senator, which law(s) would you have voted for/against? Explain your reasoning. Do you think the Main Street Fairness Act will ever become law? Explain your position

What is the goal of government regulation of business : What is the goal of government regulation of business? By whom are administrative agencies run? How long do these individuals serve

What sort of recruitment campaign would you suggest : What sort of recruitment campaign would you suggest to increase the number of minority applicants? Discuss advertising and other approaches to this topic

Briefly summarise what personal firewalls can do : Describe your experience working with your chosen security-related tools. Analyse which aspects of the tools will be useful for security purposes for experts and for normal users.

User Account

All Pages