#Additional Question: As a reminder, in the ECLSK dataset, the following variables
represent: cregion - region of the United States the student lives in,
math_sc - math score on the IRT standardized test,
k_sesq - the socioeconomic quintile that corresponds to the child's social class
where FIRST QUINTILE represents the lowest quintile.
#1. Import the data eclsk from the Data Folder. For each variable, list what the
variable measures and if the variable is categorical or numerical.
#2. Calculate, display in a table, and interpret the appropriate measures of CT
and measures of dispersion for region and for math test score by SES quintiles.