Publications by Laboratory Exercise No. 5
Stat 141 Analysis of RBD Experiments Using R
Loading required packages library(agricolae) library(ExpDes) ## ## Attaching package: 'ExpDes' ## The following objects are masked from 'package:agricolae': ## ## lastC, order.group, tapply.stat Reading and preparing the data #RCBD without sub-sample rcbd <- read.csv("rcbd.csv") rcbd$Trt <- factor(rcbd$TRT) rcbd$Block <- factor(rcbd$...
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Stat 141 Multiple Comparisons Using R
Import data chap4demo <- read_excel("chap4demo.xlsx") chap4demo$Trt <- factor(chap4demo$fertilizer) head(chap4demo) ## # A tibble: 6 × 4 ## trt fertilizer yield Trt ## <chr> <dbl> <dbl> <fct> ## 1 T1 0 4.89 0 ## 2 T1 0 4.79 0 ## 3 T1 0 4.65 0 ## 4 T1 0 4.47 0 ...
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ANSWER KEY Lab Exercise No. 1 (Stat 141)
Problem No. 1 For the given experiment, identify the following: factor(s): drug levels of each factor(s): \(D_1, D_2\) treatments: \(D_1, D_2\) blocks: hospitals appropriate linear model (fixed, random or mixed): fixed treatment structure (one-way or two-way): one-way design structure (CRD, RCBD, LSD): RCBD experimental units: wards measurement...
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Data Visualization using ggplot2
Plotting One Variable Introduction To visualize one variable, the type of graphs to be used depends on the type of the variable: For categorical variable or grouping variables. You can visualize the count of categories using a bar plot or using a pie chart to show the proportion of each category. Dot charts can be another alternative. For con...
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Advance Quantitative Data Analysis Tools
Advance Quantitative Data Analysis Tools Norberto E. Milla, Jr. Department of Statistics, Visayas State University Outline of presentation Introduction to softwares: R/RStudio, JASP, and jamovi Descriptive statistics: Frequency tables and plots for categorical data, Summary statistics and plots for continuous data Inferential sta...
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Stat 122 Long Exam No. 4 2Sem AY 2022-2023
Instructions: Answer the following as indicated. Show detailed solutions. Problem No. 1: Let \(Y_1, Y_2, \cdots, Y_n\) denote a random sample from a population with mean \(\mu\) and variance \(\sigma^2\). Consider the following three estimators for \(\mu\). \[\begin{align} \hat{\mu}_1 &= \frac{1}{2}(Y_1 + Y_2) \notag \\ \hat{\mu}_2 &= \frac{...
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Econ 115 Lab Exercise No. 3
The data set, loanapp.csv, includes actual data from 1,777 mortgage loan applications, including whether or not a loan was approved, and a number of possible explanatory variables including demographic information of the applicants and financial variables related to the applicant’s ability to pay the loan such as the applicant’s income and...
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Stat 136 Lab Exercise No. 5
INSTRUCTION: Provide details of all calculations. Submit your answer sheet in PDF. Let a random sample of 5 observations from a \(N(25, \sigma^2)\) distribution be 26.05, 29.39, 23.58, 23.95, and 23.38. What is the equation of the likelihood function of the variance . Out prior belief is that the distribution of the standard deviation has med...
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Econ 115 Lab Exercise No. 2
Use the meap93 data set in the wooldridge package for this exercise. In this data set math10 denote the percentage of tenth graders at a high school receiving a passing score on a standardized mathematics exam while lnchprg denote the percentage of students who are eligible for the lunch program. Fit the following models to the data and perfor...
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Stat 122 Problem Set No. 4
INSTRUCTION: Present neat and detailed solutions. Problem No. 1 Suppose that \(Y_1, Y_2, Y_3\) denote a random sample from an exponential distribution with density function \[ f_Y(y) = \begin{cases} \frac{1}{\theta} e^{-\frac{y}{\theta}}, y>0 \\ 0, \text{elsewhere} \end{cases} \] Consider the following five estimators of \(\theta\): \[\be...
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