Publications by Josh Iden
DATA 605 HW13
DATA 605 HW13 Josh Iden 2022-11-20 First move the constant out front, \[ = 4 * \int{e^{-7x}dx} \] Substitute u, \[ u = -7x \rightarrow \frac{du}{dx}= -7 \rightarrow du = -7dx \rightarrow dx = -\frac{1}{7}du \] \[ = 4 * \int{e^udx} \rightarrow e^u-\frac{1}{7}du \rightarrow -\frac{1}{7}e^udu \] \[ = 4 * \int{-\frac{1}{7}e^udu} \] Since \[\int{e^udu...
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DATA 606 LAB 9
Grading the professor Many college courses conclude by giving students the opportunity to evaluate the course and the instructor anonymously. However, the use of these student evaluations as an indicator of course quality and teaching effectiveness is often criticized because these measures may reflect the influence of non-teaching related charac...
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DATA 605 HW14
DATA 605 HW14 Josh Iden 2022-12-04 Q1: \[f(x) = 1-x\] The Taylor series \(f(x)\) at \(a\) is defined as: \(f(x) = f(a) + \frac{f'(a)}{1!}(x-a) + \frac{f''(a)}{2!}(x -a)^2 + \frac{f'''(a)}{3!}(x-a)^3 + ...\) With a center 0: 1-x \(= 1 + \frac{f'(1-x)(0)}{1!}x + \frac{f''(1-x)(0)}{2!}x^2 + \frac{f'''(1-x)(0)}{3!}x^3 + ...\) \(= 1 + \frac{-1}{1!}x ...
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DATA 606 Final Project Slides
DATA 606 Final Project Josh Iden ABSTRACT THE DATA 5,836 Observations Observational Study Random Sampling of Non-Voters Questions Does It Matter Who Wins Elections? (1=Yes, 2=No) How Easy Is It To Vote? (1=Easy, 4=Difficult) Are You Currently Registerd To Vote? (1=Yes, 2=No) Loading The Data # loading dataset url = "https://raw.githubuserco...
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DATA 606 Final Project
DATA 606 Final Project Josh Iden Abstract This project looks at responses from a FiveThirtyEight.com sponsored survey conducted between Sept. 15-25 2020 amongst non-voters to questions regarding their attitudes about elections and whether there is a relationship between education level and voter attitudes based on those responses. Of the 33 que...
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DATA 605 HW15
x <- c(5.6,6.3,7,7.7,8.4) y <- c(8.8,12.4,14.8,18.2,20.8) coefs <- coef(lm(y~x)) intercept <- coefs[[1]] slope <- coefs[[2]] print(paste("Intercept:",intercept)) ## [1] "Intercept: -14.8" print(paste("Slope:",slope)) ## [1] "Slope: 4.25714285714285" \(\hat{y} = 4.26x - 14.8\) Find the critical points, \(\frac{d}{dx} = -6y^2 + 24\) \(\frac{d}{d...
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DATA 605 FINAL
Problem 1: PageRank Problem 2: Digit Recognizer Problem 3: House Prices Problem 1: PageRank Problem Set Solution 1 Form the \(A\) matrix. Then introduce decay and form the \(B\) matrix as we did in the course notes. # form A matrix A = matrix(c(0, 1/2, 1/2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1/3, 1/3, 0, 0, 1/3, 0, ...
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