Publications by Siti Abigayle Rachman Tandaju
Lab6: Goodness of Fit
1 7 Exercise 7.1 Exercice Please work out in R by doing a chi-squared test on the treatment (X) and improvement (Y) columns in treatment.csv. treatment<- read.csv("treatment.csv") table(treatment$treatment, treatment$improvement) ## ## improved not-improved ## not-treated 26 29 ## treated ...
3701 sym R (1837 sym/15 pcs) 1 img
Hypothesis Testing
# Introduction As a data scientist you probably retain or reject hypothesis based on measurements of observed samples. The decision is often based on a statistical mechanism called hypothesis testing. Let’s watching the following video: There are three conditions of having hypothesis testing included: Left Tailed Test: When the \(\bar{x}\) i...
56808 sym R (8388 sym/67 pcs) 5 img
Solving Nonlinear Equations
1 Bisection Method The bisection method is another approach to finding the root of a continuous function \(f(x)\) on an interval \([a,b]\). The method takes advantage of a corollary of the intermediate value theorem called Bolzano’s theorem which states that if the values of \(f(a)\) and \(f(b)\) have opposite signs, the interval must contain a...
41217 sym R (7260 sym/38 pcs) 14 img
Confidence Intervals
1 Brief Introduction Please watching this video, to get some ideas about Confidence Intervals (CI) 2 CI in Business This video guide you, how can you apply Confidence Intervals in Business. 3 Your Exercise In this section, your expected to get familiar with confidential intervals exercise: 3.1 Exercise 1 Find a point estimate of average univer...
29987 sym R (7631 sym/72 pcs) 5 img
Probability Distributions
1 Binomial Distribution 1.1 Question What is a binomial distribution in Statistics? What is binomial distribution used for? Please argue 4 requirements needed to be a binomial distribution? Is a binomial distribution a normal distribution? Suppose there are twenty multiple choice questions in an Statistics class quiz. Each question has five pos...
29086 sym R (1128 sym/24 pcs) 1 img
Linear Programming Modeling ( Optimization W3 )
## The Problem Suppose a farmer has 75 acres on which to plant two crops: wheat and barley. To produce these crops, it costs the farmer (for seed, fertilizer, etc.) $120 per acre for the wheat and $210 per acre for the barley. The farmer has $15000 available for expenses. But after the harvest, the farmer must store the crops while awaiting avou...
3128 sym R (5589 sym/38 pcs) 1 img
Midterm Exam : Computational Statistics
1 Bab 8 Dugaan dalam Regresi Linier 1.1 Teorema Gauss-Markov Teorema Gauss-Markov memberitahu kita bahwa ketika memperkirakan parameter model regresi linier sederhana \(\beta_0\), dan \(\beta_1\), \(\hat{\beta_0}\) dan \(\hat{\beta_1}\) yang kita dapatkan adalah perkiraan tidak bias linier terbaik. (Kondisi sebenarnya teorema Gauss-Markov lebih ...
71856 sym R (9115 sym/78 pcs) 7 img
Midterm Exam : Optimization
#Question 1 Find the maximum solution to Z=4x+3y Suppose that the objective function is subject to the following constraints: x≥0 y≥2 2y≤25−x 4y≤2x−8 y≤2x−5 ##Answer # Import lpSolve package library(lpSolve) # Set coefficients of the objective function f.obj <- c(4, 3) # Create constraint matrix f.con = matrix(c(1,2, ...
3826 sym R (3922 sym/25 pcs) 2 img
UAS Research Methodology : Naive Bayes, Decision Tree, Random Forest dan Regresi
1 Research Background The sinking of the Titanic is one of the most infamous shipwrecks in history. On April 15, 1912, during her maiden voyage, the widely considered “unsinkable” RMS Titanic sank after colliding with an iceberg. Unfortunately, there weren’t enough lifeboats for everyone onboard, resulting in the death of 1502 out of 2224 p...
4063 sym R (11924 sym/59 pcs) 3 img
Optimization Week 9 : Monte Carlo Simulation
1 Perihal Pada lab ini kita akan fokus pada analisis sensitivitas dan simulasi Monte Carlo. Analisis sensitivitas adalah studi tentang bagaimana ketidakpastian dalam keluaran model atau sistem matematika (numerik atau lainnya) dapat dibagi ke berbagai sumber ketidakpastian dalam masukannya. Kami akan menggunakan paket R lpSolveAPI. Simulasi Monte...
23976 sym R (5211 sym/26 pcs) 1 img