In this section, a sample of IT specialists' salaries will be analyzed. Begin by examining the first five observations of the dataset:

• work_year - this year, the salary was paid;
• experience_level - the experience level: EN is Entery-level, MI is Mid-level, SE-Senior-level, EX is Executive level;
• job_title - the name of a job;
• salary - the value of the salary;
• salary_currency - the currency of the salary;
• salary_in_usd - the value of the salary in USD;
• company_location - the location of the company;
• company_size - the size of the company: S-Small, M-Medium, L-Large.

Now begins a review of data types in statistics, followed by an activity to match each column name with its corresponding data type.