Organize Qualitative Data in Frequency and Relative Frequency Distributions

Michael Sullivan

9/1/2023

Table1 <- read.csv("https://sullystats.github.io/Stats7e/Data/Ch2/Table1.csv")

## If using Stats6e:

## Table1 <- read.csv("https://sullystats.github.io/Statistics6e/Data/Chapter2/Table1.csv")

head(Table1,n=4)

##   Location

## 1     Back

## 2    Wrist

## 3    Elbow

## 4     Back

install.packages("mosaic")

The Tally Command in Mosaic

First, we will find the frequency distribution. The syntax in Mosaic is

tally(~var_name,data=df_name)

library(mosaic)

tally(~Location,data=Table1)

## Location

##     Back    Elbow    Groin     Hand      Hip     Knee     Neck Shoulder 

##       12        1        1        2        2        5        1        4 

##    Wrist 

##        2

To get a relative frequency distribution add the command format=“proportion”.

tally(~Location,format="proportion",data=Table1)

## Location

##       Back      Elbow      Groin       Hand        Hip       Knee       Neck 

## 0.40000000 0.03333333 0.03333333 0.06666667 0.06666667 0.16666667 0.03333333 

##   Shoulder      Wrist 

## 0.13333333 0.06666667