Publications by Sangeetha Sasikumar
Assignment 2- Classification Metrics
Download the classification output data set. data <- read.csv("https://raw.githubusercontent.com/Sangeetha-007/Classification-Metrics/main/classification-output-data.csv") head(data) ## pregnant glucose diastolic skinfold insulin bmi pedigree age class ## 1 7 124 70 33 215 25.5 0.161 37 0 ## 2 2 12...
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Assignment 2-Classification Metrics Ver 2
Download the classification output data set. data <- read.csv("https://raw.githubusercontent.com/Sangeetha-007/Classification-Metrics/main/classification-output-data.csv") head(data) The data set has three key columns we will use: The data set has three key columns we will use: class: the actual class for the observation scored.class: the predic...
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Chapter_1_621
Linear Models with R, Question 1.1 The dataset teengamb concerns a study of teenage gambling in Britain. Make a numerical and graphical summary of the data, commenting on any features that you find interesting. Limit the output you present to a quantity that a busy reader would find sufficient to get a basic understanding of the data. data(teenga...
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Data-605 Final Problem 2
You are to register for Kaggle.com and compete in the House Prices: Advanced Regression Techniques competition. https://www.kaggle.com/c/house-prices-advanced-regression-techniques . library(tidyverse) ## ── Attaching packages ─────────────────────────────────────── t...
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Data-605 Final Problem 1
Problem 1. Probability Density 1: X~Gamma. Using R, generate a random variable X that has 10,000 random Gamma pdf values. A Gamma pdf is completely describe by n (a size parameter) and lambda (λ , a shape parameter). Choose any n greater 3 and an expected value (λ) between 2 and 10 (you choose). n<-10 lambda<-7 random<-10000 x_gamma<-rgamma(rando...
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Discussion Board 14-605
Use the Taylor Series given in Key Idea 8.8.1 to verify the given identity: cos(-x)=cos(x) Key Idea 8.8.1 \[ cosx=\Sigma_{n=0} (-1)^{n} \frac{x^{2n}}{(2n)!} \] First Few terms: \[cos(x)= 1-\frac{x^{2}}{2!}+\frac{x^{4}}{4!}-\frac{x^{6}}{6!}+... \] \[cos(-x)=1-\frac{-x^{2}}{2!}+\frac{-x^{4}}{4!}-\frac{-x^{6}}{6!}= 1-\frac{x^{2}}{2!}+\...
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Document
Use integration by substitution to solve the integral below. \[ \int 4e^{-7x} dx \] \[ u=-7x \] \[ du=-7dx, \frac{du}{-7}=dx \] \[\int 4e^{u} \frac{du}{-7}= \frac{-4}{7} \int e^{u} du= \frac{-4}{7}e^{u} +c =\frac{-4}{7}e^{-7x} +c \] Biologists are treating a pond contaminated with bacteria. The level of contamination is chan...
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Discussion Board 13-605
Ch. 7.1, Question 10 from “APEX Calculus” by Gregory Hartman. Find the area of the shaded region in the given graph. Since the upper curve is the sine curve and the bottom one is cosine, we are going to do upper - lower, thus the integral of sine-cosine. \[\int_{\pi/4}^{5 \pi/4} sinx-cosx \,dx \ \] \[=-cosx-sinx \] \[ -cos(5\pi/4)-(-cos(\pi/...
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605-Multiple Linear Regression
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? Dichotomous variable vs Quadratic Variable: H...
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Publish Document
I chose this inbuilt R dataset 'ToothGrowth because I thought it was a strange study, so wanted to analyze it. ToothGrowth data set contains the result from an experiment studying the effect of vitamin C on tooth growth in 60 Guinea pigs. data("ToothGrowth") head(ToothGrowth) ## len supp dose ## 1 4.2 VC 0.5 ## 2 11.5 VC 0.5 ## 3 7.3 V...
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