Political parties learned to increase their chances of winning elections by

Historical vs today's presidents (compare)

The ability to accurately gauge the distance of the coffee cup on your desk as you reach for it is called:

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