Publications by Author 1
Project 02 - Statistical Evaluation of Property Assessment
1 INTRODUCTION In property taxation, accurate market value assessment is essential to ensure that homeowners contribute fairly to municipal revenue without being overcharged. However, in practice, the valuation process is often based on the discretion of the county tax assessor rather than strict statistical procedures. This raises the possibi...
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IE 5342 - FINAL EXAM
1 QUESTION 1 Working with the data # Working with the data data1 <- read.csv("https://raw.githubusercontent.com/tmatis12/datafiles/refs/heads/main/lifespans.csv") data1 ## Supplier Lifespan ## 1 A 504.9671 ## 2 A 498.6174 ## 3 A 506.4769 ## 4 A 515.2303 ## 5 A 497.6585 ## 6 A 497.6586 ## ...
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Homework 5 - Module 6
1 Question 6.8 A bacteriologist is interested in the effects of two different culture media and two different times on the growth of a particular virus. He or she performs six replicates of a \(2^2\) design, making the runs in random order. Analyze the bacterial growth data that follow and draw appropriate conclusions. Analyze the residuals an...
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Homework 4 - Module 5
1 Question 5.2 The following output was obtained from a computer program that performed a two-factor ANOVA on a factorial experiment. (a) Fill in the blanks in the ANOVA table. You can use bounds on the P-values. (b) How many levels were used for factor B? (c) How many replicates of the experiment were performed? (d) What conclusions would you...
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Homework 3 - Module 4
1 Question 3.23 The effective life of insulating fluids at an accelerated load of 35 kV is being studied. Test data have been obtained for four types of fluids. The results from a completely randomized experiment were as follows (a) Is there any indication that the fluids differ?. Use \(\alpha = 0.05\). (b) Which fluid would you select, given...
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F. Assignment 9
1 QUESTION 1 Suppose we wish to design a new experiment that tests for a significant difference between the mean effective life of four insulating fluids at an accelerated load of 35kV. The variance of fluid life is estimated to be 3.5 hrs based on preliminary data. We would like this test to have a type 1 error probability of 0.05, and for thi...
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IE 5342 - HOMEWORK 1
1 Question 2.24 Two machines are used for filling plastic bottles with a net volume of 16.0 ounces. The filling processes can be assumed to be normal, with standard deviations of \(\sigma_1 = 0.015\) and \(\sigma_2 = 0.018\). The quality engineering department suspects that both machines fill to the same net volume, whether or not this volume...
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Assignment 4
1 Load Data # Load Data data<-read.csv("https://raw.githubusercontent.com/tmatis12/datafiles/main/US_Japanese_Cars.csv") rmarkdown::paged_table(data) # Data Wrangling uscars = data[,1] uscars ## [1] 18 15 18 16 17 15 14 14 14 15 15 14 15 14 22 18 21 21 10 10 11 9 28 25 19 ## [26] 16 17 19 18 14 14 14 14 12 13 jpcars = data[1:28,2] jpcars ...
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Group5_FA2
read csv file dat <- read.csv("https://raw.githubusercontent.com/tmatis12/datafiles/main/normtemp.csv") head(dat) ## Temp Sex Beats ## 1 96.3 1 70 ## 2 96.7 1 71 ## 3 96.9 1 74 ## 4 97.0 1 80 ## 5 97.1 1 73 ## 6 97.1 1 75 get male data: maleData <- dat[dat$Sex==1,] head(maleData) ## Temp Sex Beats ## 1 96.3 1 ...
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