Publications by James Naval
JNaval_Data605_Final_Exam
Computational Mathematics. Your final is due by the end of day on 19 May This project will show off your ability to understand the elements of the class. You are to register for Kaggle.com (free) and compete in the House Prices: Advanced Regression Techniques competition. https://www.kaggle.com/c/house-prices-advanced-regression-techniques . I w...
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DATA607_Week14_Final_Project
Abstract Citi Bike is the largest bike share program in the United States, that New York City Launched in May 2013. For this assignment I used Citi Bike data public data that has been cross referenced with census data. My goal is to find the relationship between Annual membership and casual membership, and what type of bike they rented more whe...
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JNaval_DATA605_Discussion_Post_Week14
Exercise 8.8 # 5 Key Idea 8.8.1 gives the nth term of the Taylor series of common functions. In Exercises 3 – 6, verify the formula given in the Key Idea by finding the first few terms of the Taylor series of the given function and identifying pattern. \[ f(x) = \tfrac {1}{(1 - x)}; c = 0 \] \[=> f'(x) = \tfrac {1}{(1 - x)^2} => f(1) = 1 ...
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DATA607_Week14_Project4
Introduction For this assignment we have given two sets of email messages. One set is known to be spam and another set is known to be “ham”, a legitimate message. I have downloaded two files from the example corpus https://spamassassin.apache.org/old/publiccorpus/ 1. I have downloaded the files named 20021010_easy_ham.tar.bz2 and 20021010_s...
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JNaval_DATA605_HW13
Question 1 Use integration by substitution to solve the integral below: \[ \int 4 e^{-7x} dx \]. Let \(u = -7x\), therefore \(du = -7dx\). The integral simplifies to: \[-\frac{4}{7} \int e^u du = -\frac{4}{7} e^{-7x} + C\] Question 2 Biologists are treating a pond contaminated with bacteria. The level of contamination is changing at a rate of \...
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JNaval_HW12_DATA605
The attached who.csv dataset contains real-world data from 2008. The variables included follow. Country: name of the country LifeExp: average life expectancy for the country in years InfantSurvival: proportion of those surviving to one year or more Under5Survival: proportion of those surviving to five years or more TBFree: proportion of the popul...
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DATA607_Week12_Final_Project_Proposal
Data Preparation library(tidyverse) library(openintro) library(flextable) library(infer) library(psych) library(epiDisplay) library(summarytools) knitr::opts_chunk$set(tidy.opts=list(width.cutoff=50),tidy=TRUE,echo =TRUE) set_flextable_defaults(fonts_ignore=TRUE) projectid = "data-607-project" # load Data Citibike <- read.csv("202308-...
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JNaval_DATA605_Discussion_Post_Week12
Using R, build a multiple regression model for data that interests you. Include in this model at least one quadratic term, one dichotomous term, and one dichotomous vs. quantitative interaction term. Interpret all coefficients. Conduct residual analysis. Was the linear model appropriate? Why or why not? Introduction We were told to choose a d...
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DATA607_Week11_TidyverseAssignment
Your task here is to Create an Example. Using one or more TidyVerse packages, and any dataset from fivethirtyeight.com or Kaggle, create a programming sample “vignette” that demonstrates how to use one or more of the capabilities of the selected TidyVerse package with your selected dataset. (25 points) Introduction For this tidyverse assig...
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JNaval_DATA605_HW11
Using the “cars” dataset in R, build a linear model for stopping distance as a function of speed and replicate the analysis of your textbook chapter 3 (visualization, quality evaluation of the model, and residual analysis.) Dataset load For this section I will load the ‘cars’ dataset in R, and glimpse so that I can see the data. After ...
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