Publications by fname lname & fname lname
Data Types
Introduction Data types are an essential concept in any programming language. They define the kind of data that can be stored and manipulated within a program. In R, the primary data types are Numeric, Integer, Character, Logical, Complex, and Factor. This document provides an overview of each data type along with examples. Numeric The numeric dat...
1425 sym
Assignment 1
Description Install R and RStudio on your computer. You can find both downloads at: https://posit.co/download/rstudio-desktop/ Acceptance Criteria After installing R and RStudio, open RStudio and take a screenshot and upload it to Blackboard. Data N/A Points 1...
272 sym
Assignment 2
Description Import the data HR_comma_sep.csv List each variable and their data types (you can do this as a comment using a ‘#’) List each variable and their variable types (you can do this as a comment using a ‘#’) Acceptance Criteria Upload a complete screenshot of your RStudio session on Blackboard. Your code and console should be visib...
465 sym
Variable Types
Introduction In data analytics, understanding the types of variables is crucial as it informs the choice of analytical methods and techniques. This document outlines the primary types of variables: Numeric, Categorical, Ordinal, and Binary, along with examples of each. Numeric Variables Numeric variables represent quantitative data that can be mea...
1989 sym
HR analysis
The Data ## satisfaction_level last_evaluation number_project average_montly_hours ## Min. :0.0900 Min. :0.3600 Min. :2.000 Min. : 96.0 ## 1st Qu.:0.4400 1st Qu.:0.5600 1st Qu.:3.000 1st Qu.:156.0 ## Median :0.6400 Median :0.7200 Median :4.000 Median :200.0 ## Mean :0.6128 Mean :0....
516 sym
Assignment 7
Data prep for modeling Data Summary: The variables: store, and holiday flag are continuous, but should be categorical ## Store Date Weekly_Sales Holiday_Flag ## Min. : 1 Length:6435 Min. : 209986 Min. :0.00000 ## 1st Qu.:12 Class :character 1st Qu.: 553350 1st Qu.:0.00000 ## Median :23 ...
1065 sym
Assignment 6
1. Is there an association between leaving the company and having a work accident? ## ## ## Cell Contents ## |-------------------------| ## | N | ## | Chi-square contribution | ## | N / Row Total | ## | N / Col Total | ## | N / Table Total | ## |-------------------------| ## ## ## Total Obs...
326 sym
Assignment 6
1. Is there an association between leaving the company and having a work accident? ## ## ## Cell Contents ## |-------------------------| ## | N | ## | Chi-square contribution | ## | N / Row Total | ## | N / Col Total | ## | N / Table Total | ## |-------------------------| ## ## ## Total Obs...
315 sym
Assignment 5
1. Is there a difference in satisfaction level between those that left and those that stayed in the company? Employees that stay, on average, are more satisfied. ## ## Welch Two Sample t-test ## ## data: hr$satisfaction_level by hr$Employee_Status ## t = -46.636, df = 5167, p-value < 2.2e-16 ## alternative hypothesis: true difference in means b...
553 sym
Delete Me
t-test of MPG by Transmission ## ## Welch Two Sample t-test ## ## data: cars1$mpg by cars1$am_char ## t = -3.7671, df = 18.332, p-value = 0.001374 ## alternative hypothesis: true difference in means between group Automatic and group Manual is not equal to 0 ## 95 percent confidence interval: ## -11.280194 -3.209684 ## sample estimates: ## mea...
96 sym