Selected Office for Each of the Twelve Months Prior to the Exercise

Essay

selected office for each of the twelve months prior to the exercise program and then for each of the
twelve months after the exercise program is initiated. The "before" and "after" expenses are
compared on a month-to-month basis. Which test design would be the most appropriate for this
scenario?
-A corporation desires to estimate the total number of worker-hours lost for a given month because of accidents among all employees. Because laborers, technicians, and administrators have different accident rates, the researcher decides to randomly select employees from each of the three groups and records the number of worker-hours lost for the given month for each employee. What kind of sampling does this illustrate?