caschool.csv: Test score and class-size.

caschool.dta: caschool data in Stata data format.

cps08.csv: Wage equation.

sampling_dist.R: R code that illustrates the sampling distribution.

sampling_dist.pdf: R code in pdf file. 

CollegeDistance.csv: college attendance decision. 

CollegeDistance_DataDescription.pdf: college distance data descption. 

ch8_cps.csv: dataset for the practice final.  

birthweight_smoking.csv: Effect of smoking on birth weight.