The mixed economy of australia is becoming more of a market economy as fewer economic decisions are made by
a. the military.
b. the government.
c. workers.
d. private industry.

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling