Sandy is trying to decide which new soft drink to try. she decides to try "bliss mist" because it has a prettier bottle and the theme song is running through her head. sandy is using the heuristic to make her decision. availability "length equals strength" "how do i feel about it? " anchoring and adjustment

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