Question 3 Programming exercise for R Studio This question requires the use of the software R Studio. Specifically, you need to create a short R script. Please attach your R script and outputs to your Assignment. Please perform 2 Monte Carlo Experiments and investigate the behaviour of the sum of all the sample data. Consider the example of rolling a dice four times in a row. A sample now consists of four independent random draws from the set {1,2,3,4,5,6). For instance, your sample set may be {2,5,1,1). It is apparent that the sum of these four random variables (2+5+1+1=9) is also a random variable. We can use R's random number generation to learn more about the distribution of the sample sum. The basic idea is to simulate outcomes of the true distribution repeatedly drawing random samples of 4 observation (rolling the dice four times). To perform these simulations in R, please proceed as follows: 2 1. Set the sample size equal 4 and the number of samples (repetitions) to be drawn accord- ing to your own preference. You could use for instance 50, 200; 10,000 or 500,000 etc. Make sure to choose a smaller number of repetitions (< 500) for the first experiment and a larger number of repetitions (>5,000) for the second experiment. 2. Set a random seed equal to your student number. For instance, if your student number is: 1,2,3,4,5,6 then set.seed(123456). Also make sure that your student number appears in the title of the histogram. You can do so by adding the command line main="Student Number 123456", after hist(sample.sums,...) = 3. Use the function replicate() in conjunction with sample() to draw random observations. Note: the outcome of replicate() is a matrix. It contains the drawn samples as columns. 4. Compute sample sums using the command colSums (). This function computes the sum of each column, i.e., of each sample and returns a vector. 5. Plot the computed vector of sums in a histogram. Keep the number of bins of the histogram equal to 25 for the two experiments. Carefully describe what you see in the first experiment (smaller number of repetitions) and in the second experiment (larger number of repetitions). Carefully compare the two histograms and explain what you see!
Question 3 Programming exercise for R Studio This question requires the use of the software R Studio. Specifically, you need to create a short R script. Please attach your R script and outputs to your Assignment. Please perform 2 Monte Carlo Experiments and investigate the behaviour of the sum of all the sample data. Consider the example of rolling a dice four times in a row. A sample now consists of four independent random draws from the set {1,2,3,4,5,6). For instance, your sample set may be {2,5,1,1). It is apparent that the sum of these four random variables (2+5+1+1=9) is also a random variable. We can use R's random number generation to learn more about the distribution of the sample sum. The basic idea is to simulate outcomes of the true distribution repeatedly drawing random samples of 4 observation (rolling the dice four times). To perform these simulations in R, please proceed as follows: 2 1. Set the sample size equal 4 and the number of samples (repetitions) to be drawn accord- ing to your own preference. You could use for instance 50, 200; 10,000 or 500,000 etc. Make sure to choose a smaller number of repetitions (< 500) for the first experiment and a larger number of repetitions (>5,000) for the second experiment. 2. Set a random seed equal to your student number. For instance, if your student number is: 1,2,3,4,5,6 then set.seed(123456). Also make sure that your student number appears in the title of the histogram. You can do so by adding the command line main="Student Number 123456", after hist(sample.sums,...) = 3. Use the function replicate() in conjunction with sample() to draw random observations. Note: the outcome of replicate() is a matrix. It contains the drawn samples as columns. 4. Compute sample sums using the command colSums (). This function computes the sum of each column, i.e., of each sample and returns a vector. 5. Plot the computed vector of sums in a histogram. Keep the number of bins of the histogram equal to 25 for the two experiments. Carefully describe what you see in the first experiment (smaller number of repetitions) and in the second experiment (larger number of repetitions). Carefully compare the two histograms and explain what you see!
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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