qmb2100 - class1 notes

• descriptive statistics: you have access to the entire data set

• population: all the objects of interest

• two types of variables - qualitative & quantitative

  • qualitative: some characteristic or value that is not a number (ex. what state are you from)

  • quantitative: a number (ex. how old are you, what’s your GPA)

• discreet variables: whole numbers

• continuous variables: can be whole numbers but decimals are acceptable as well

4 levels of measurement

• nominal: using numbers to categorize data

• ordinal:

• interval:

• ratio: when # is 0 it didn’t exist