Publications by Gabriella Martinez
DATA 607 HW7 republish
Working with XML and JSON in R Assignment Overview The goal of this assignment is to give you practice in working with XML and JSON in R. Your task is to: Pick three of your favorite books on one of your favorite subjects where at least one of the books has more than one author. Each book should include the title, authors, and two or three othe...
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DATA605 Week 9 Post
Grinstead and Snell’s Introduction to Probability CHAPTER 9. CENTRAL LIMIT THEOREM 9.1. BERNOULLI TRIALS pg. 337 10. Find the probability that among 10,000 random digits, the 3 appears no more than 931 times. Area under the normal curve between Z=0 and Z= 2.28 is 0.4887 using the normal distribution table to two decimal points: https://www....
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DATA605 Week 10 Post
Grinstead and Snell’s Introduction to Probability CHAPTER 12. RANDOM WALKS 12.1. RANDOM WALKS IN EUCLIDEAN SPACE pg.486 13.Use Stirling’s Formula, prove that \(\binom{2n}{n} \sim \frac{2^{2n}}{\sqrt{{\pi}n}}\) Stirling’s Formula: \(n! \sim \sqrt{2{\pi}n}\space(\frac{n}{e})^n\) \(\binom{2n}{n} = \frac{2n!}{n!(2n-n)!} = \frac{(2n)!}{(n!)^...
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DATA605 HW10
Smith is in jail and has 1 dollar; he can get out on bail if he has 8 dollars. A guard agrees to make a series of bets with him. If Smith bets A dollars, he wins A dollars with probability .4 and loses A dollars with probability .6. Find the probability that he wins 8 dollars before losing all of his money if: *The Gambler’s Ruin Problem: \(P_{...
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DATA607 HW9
Assignment Overview The New York Times web site provides a rich set of APIs, as described here. You’ll need to start by signing up for an API key. Your task is to choose one of the New York Times APIs, construct an interface in R to read in the JSON data, and transform it into an R DataFrame. Packages library(httr) library(jsonlite) library...
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DATA607 TidyVerse Project
Assignment Overview Clone the provided repository. Write a vignette using one TidyVerse package. Write a vignette using more than one TidyVerse packages. For this assignment I will be using the lubridate TidyVerse package using NJ Transit Train Data for the Northeast Corridor for the month of January 2020. Packages library(tidyverse) library(lu...
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DATA607 Final
Assignment Requirements \(MSDA\ 607\ Final\ Project\) Deliverables Schedule Deliverable Date Points One Paragraph Proposal Sunday April 26 20 Final Project Wednesday May 19 120 Final Project Presentation Before or during Final Meetup on Wednesday May 19 30 Policy on Collaboration You may work in a team of up to three people. Each projec...
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DATA607 Final
Assignment Requirements \(MSDA\ 607\ Final\ Project\) Deliverables Schedule Deliverable Date Points One Paragraph Proposal Sunday April 26 20 Final Project Sunday May 10 120 Final Project Presentation Before or during Final Meetup on Wednesday May 13 30 Policy on Collaboration You may work in a team of up to three people. Each project t...
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DATA605 Final Project
Final Project Assignment Overview Your final is due by the end of the last week of class. You should post your solutions to your GitHub account or RPubs. You are also expected to make a short presentation via YouTube (mp4 file can also be found on GitHub) and post that recording to the board. This project will show off your ability to understand...
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DATA605 Week 14 Post
FORUM DESCRIPTION Pick any exercise in 8.8 of the calculus textbook. Solve and post your solution. If you have issues doing so, discuss them. Taylor and Maclaurin Series Definition 8.8.1 Taylor and Maclaurin Series let f(x) have derivatives of all orders at x = c. The Taylor Series of f(x) centered at c is: \(\sum_{n = 0}^{\infty} \frac{f^{(n...
1308 sym R (189 sym/2 pcs)