R HW- estimation (20pts)
Name______________
Introduction
In this project you will demonstrate how to use Method of Moments and Maximum Likelihood Estimation to find parameters of a distribution for which you believe were used in the data generating process. Consider the data set on Norwegian fire losses provided for this project on Canvas. The file name is norweginafire.txt. Complete this assignment using R Markdown and provide your R m
arkdown files (2 files). If you miss to supply both files your project will not be graded. The pdf/or html file must show: R code, output, and figures properly. Otherwise, your project will not be graded and your score will be 1/20 to recognize your attempt to submit.
Each question below is worth 2pts. All derivations by hand must be provided for grading. Late submissions will not be graded (those sent by email). Group work is allowed, but each student must provide individual submission of his/her own work. If two submissions are found to be identical they will each receive zero score.
Filter the data for one particular year that is assigned to your group. The assignment is the defined as follows
Table C1-1981
Table C3-1982
Table C5-1983
Table D1-1984
Table D3-1985
Table C2-1986
Table C4-1987
Table D2-1988
Table D4-1989
- Find the parameter estimates using the MM method assuming that the data came from a normal distribution.
- Plot the density on top of your histogram. Discuss your findings using 3 full sentences.
- Repeat 1) assuming that the data generating process is gamma distribution.
- Plot the density of gamma on top of this histogram. Discuss your findings in 3 full sentences.
- Plot gamma and normal density on top on the histogram using different colors. Discuss your findings. Min 2 full sentences.
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- Find the parameter estimates using the MLE method assuming that the data came from a normal distribution.
- Repeat 6) assuming that the data came from log-normal distribution.
- Repeat 6) assuming that the data came from gamma distribution.
- Plot densities of log-normal, gamma, and normal and discuss your findings. Min 3 full sentences are required for full credit.
- Reflect on this project. Min 5 sentences are required.
NOTE
Due to truncation of loss data, you need to divide the pdf() for each observation by 1- F(t), where t represents the truncation point. This needs to be accounted for when deriving the log-likelihood function. You need to take screen shoots of all your derivations required for codding of this project in R.
