Publications by Elvriana Elvani(20184920012)
Goodness of Fit
1 Exercise 1.1 Exercise 1 Please work out in R by doing a chi-squared test on the treatment (X) and improvement (Y) columns in treatment.csv. Answer data <- read.csv("C:/Users/user/Downloads/treatment.csv") # Read Data head(data, 10) # Shows 10 from 105 data of treatment ## id treatment imp...
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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...
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Linear Programming Model
Case Study A manufacturing manager is in charge of minimizing the total costs (raw materials, labor and storage costs) of the following four months. In Table 3.1 can be found the cost of raw materials of one unit of final product, the demand of final product and the working hours available for each month. Labor costs are of 12 € per hour, and o...
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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...
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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...
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Hypothesis Testing
1 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 \(\bar{x}\) is...
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General Optimization
1 General Optimization In mathematics, nonlinear programming (NLP) is the process of solving an optimization problem where some of the constraints or the objective function are nonlinear. An optimization problem is one of calculation of the extrema (maxima, minima or stationary points) of an objective function over a set of unknown real variables...
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Expectation Maximization (Ekspektasi Maksimalisasi)
1 Ekspektasi Maksimalisasi Di kelas ini kita akan mengimplementasikan algoritma Ekspektasi Maksimalisasi untuk memperkirakan parameter Gaussian Mixture. Metode ini menyediakan pengklasifikasi tanpa pengawasan yang sangat berguna ketika diasumsikan distribusi Gaussian. Misalkan kita ingin memodelkan parameter populasi yang diasumsikan menjadi sala...
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Inferensi dalam Regresi Linier
1 Inferensi dalam Regresi Linier Setelah membaca bagian ini, Anda akan dapat: Memahami distribusi perkiraan regresi. Membuat perkiraan interval untuk parameter regresi, respons rata-rata, dan prediksi. Uji signifikansi regresi. Bagian terakhir kita mendefinisikan model regresi linier sederhana, \[Y_i = \beta_0 + \beta_1 x_i + \epsilon_i\] diman...
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Final Optimization
Email: elvrianae@gmail.com RPubs: https://rpubs.com/elvriana_e/ 1 Soal 1 Let say you would like to make some sausages and you have the following ingredients available: Ingredient Cost($/kg) Availability(kg) Chicken 4.32 30 Wheat 2.46 20 Starch 1.86 17 Assume that you will make 2 types of sausage: Economy (>40% Chicken) Premium (>60% Chick...
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