Question

the employment statistics computed from the establishment survey do not include:
workers with two jobs.
those who are self-employed.
workers on firms payrolls.
part-time workers on firms payrolls.

Explanation:

The establishment survey (also known as the payroll survey) counts workers on firms' payrolls (including part - time ones) and may have issues with counting workers with two jobs (but the key exclusion is self - employed). The establishment survey focuses on employees of businesses and government agencies. Self - employed individuals are not on a firm's payroll, so they are not included in the employment statistics from the establishment survey. Workers with two jobs may be counted if they are on a firm's payroll for at least one job, workers on firms' payrolls (including part - time) are included.

Answer:

those who are self - employed.