First R Code Lab (Final Version)
Katie Adams
2025-05-12
Note: You will ALWAYS leave this first RMarkdown code chunk as is. Because it contains “include=FALSE” in the curly brackets {} the chunk text will NOT appear when you knit it.
Note: Please delete all the sample text after previous code chuck that auto-populates in new RMarkdown files. Then proceed with the Lab.
Reflection Questions
How was the install process? Anything I should know for future students?
Please type your answer here.
Have you used any statistical software before?
Please type your second answer here.
Installing new packages
#install.packages("psych")
#install.packages("psychTools")
#If you wish to write text inside of a code chuck OR block out code so it does not run, add a "#" to the beginning of each line
### In order for this to Knit, we have to # out the install.packages code after the install process.When packages are installed, their names must always be enclosed by double quotation marks (” “).
Calling packages to use in file
library(psych)## Warning: package 'psych' was built under R version 4.3.3library(psychTools)## Warning: package 'psychTools' was built under R version 4.3.3When packages are called, their names are NOT enclosed by double quotation marks (” “).
Call in the sample data “epi.bfi” from the PsychTools package
data(epi.bfi)
#This is a small data set of 5 scales from the Eysenck Personality Inventory, 5 from a Big 5 inventory, a Beck Depression Inventory, and State and Trait Anxiety measures.
# Run the summary function to get some basic stats on all of the dataset's variables
summary(epi.bfi)## epiE epiS epiImp epilie
## Min. : 1.00 Min. : 0.000 Min. :0.000 Min. :0.000
## 1st Qu.:11.00 1st Qu.: 6.000 1st Qu.:3.000 1st Qu.:1.000
## Median :14.00 Median : 8.000 Median :4.000 Median :2.000
## Mean :13.33 Mean : 7.584 Mean :4.368 Mean :2.377
## 3rd Qu.:16.00 3rd Qu.: 9.500 3rd Qu.:6.000 3rd Qu.:3.000
## Max. :22.00 Max. :13.000 Max. :9.000 Max. :7.000
## epiNeur bfagree bfcon bfext
## Min. : 0.00 Min. : 74.0 Min. : 53.0 Min. : 8.0
## 1st Qu.: 7.00 1st Qu.:112.0 1st Qu.: 99.0 1st Qu.: 87.5
## Median :10.00 Median :126.0 Median :114.0 Median :104.0
## Mean :10.41 Mean :125.0 Mean :113.3 Mean :102.2
## 3rd Qu.:14.00 3rd Qu.:136.5 3rd Qu.:128.5 3rd Qu.:118.0
## Max. :23.00 Max. :167.0 Max. :178.0 Max. :168.0
## bfneur bfopen bdi traitanx
## Min. : 34.00 Min. : 73.0 Min. : 0.000 Min. :22.00
## 1st Qu.: 70.00 1st Qu.:110.0 1st Qu.: 3.000 1st Qu.:32.00
## Median : 90.00 Median :125.0 Median : 6.000 Median :38.00
## Mean : 87.97 Mean :123.4 Mean : 6.779 Mean :39.01
## 3rd Qu.:104.00 3rd Qu.:136.5 3rd Qu.: 9.000 3rd Qu.:44.00
## Max. :152.00 Max. :173.0 Max. :27.000 Max. :71.00
## stateanx
## Min. :21.00
## 1st Qu.:32.00
## Median :38.00
## Mean :39.85
## 3rd Qu.:46.50
## Max. :79.00Run the histogram and mean (statistical average) functions on the “bdi” variable (Beck Depression Inventory)
# To specify a variable from the data, within the chosen function's parentheses enter the dataset name followed by "$" (dollar symbol), then the variable name.
hist(epi.bfi$bdi)
mean(epi.bfi$bdi)## [1] 6.779221