Suppose that in an economy 100 worker-hours produce 160 units of output in year 1. in years 2 and 3, worker-hours are 120 and 130 and units of out-put are 216 and 260, respectively. using year 2 as the base year, calculate (a) the productivity index for all three years and (b) the rates of productivity growth.

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected