Name of the first spanish governor

Give an example to prove that your society is developed more than it was before 10 years ?

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

Which of the following best describes the reason the state department is interested in foreign exchange programs?