STATA Synthax File
Paper: "The Use of Interactive Personal Response Software in an Introductory International Relations Course"
Author: Ivan Dinev Ivanov 

To download csv file go to:
https://uc.box.com/s/p8sqvz6c5g2s69t2kazby1h9hafznp13
Or: 
https://uc.box.com/s/ubtugufconx3rpfsex3nq0lj1w26ermf

use "C:\Echo360-JPSEpaper.csv", clear
or "C:\Echo360-JPSEpaper.dta"
** Check the directory where the csv file has been uploaded. 

generate echo360 = technol
recode echo360 1=. 2=1

generate echo360 = improve
recode improve 0=. 1=0 2=1

generate fgensrs = technol
recode fgensrs 2=.

generate rank1 = rank
recode rank1 2.5 = 2

One Way Anova
One-way ANOVA between groups: used when you want to test two groups to see if there’s a difference between them.
graph box midterm1, over(technol)
graph box midterm2, over(technol) 
graph box finalex1, over(technol)
graph box finales1, over(technol)
graph box overallg, over(technol)

oneway midterm1 technol
oneway midterm2 technol 
oneway finalex1 technol
oneway finales1 technol
oneway overallg technol

t-test
histogram midterm1, by(echo360) normal
histogram midterm2, by(echo360) normal
histogram finalex1, by(echo360) normal
histogram finales1, by(echo360) normal
histogram overallg, by(echo360) normal

ttest midterm1, by(fgensrs)
ttest midterm2, by(fgensrs)
ttest finalex1, by(fgensrs)
ttest finales1, by(fgensrs)
ttest overallg, by(fgensrs)

ttest midterm1, by(improve)
ttest midterm2, by(improve)
ttest finalex1, by(improve)
ttest finales1, by(improve)
ttest overallg, by(improve)

ttest midterm1, by(echo360)
ttest midterm2, by(echo360)
ttest finalex1, by(echo360)
ttest finales1, by(echo360)
ttest overallg, by(echo360)

OLS Regression. Model 1: 
regress midterm1 echo360 sihelp gender rank1 major
vif
regress midterm2 echo360 sihelp gender rank1 major
vif
regress finalex1 echo360 sihelp gender rank1 major
vif
regress finales1 echo360 sihelp gender rank1 major
vif
regress overallg echo360 sihelp gender rank1 major
vif

OLS Regression. Model 2:
regress midterm1 improve sihelp gender rank1 major
vif
regress midterm2 improve sihelp gender rank1 major
vif
regress finalex1 improve sihelp gender rank1 major
vif
regress finales1 improve sihelp gender rank1 major
vif
regress overallg improve sihelp gender rank1 major
vif