How tall was george washington our president?

Researchers have found that it takes to view a mental image that is larger or covers more distance than a smaller or more compact one.

The economy of the united states is best described as

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