Data collection and sampling

A sample selected "by chance". all members of the popluation have an equal chance of being selected

• random

• systematic

• stratified

• cluster

• convenience

a sample obtained by selecting every 3rd, 4th, 10th, etc member of a population

• random

• systematic

• stratified

• cluster

• convenience

a sample obtained by dividing the population into subgroups according to some characteristic relevant to the study. Same number of subjects are then selected from EVERY subgroup

• random

• systematic

• stratified

• cluster

• convenience

dividing the population into sections or clusters and then selecting one or more clusters. Then using ALL members in the cluster as the members of the sample

• random

• systematic

• stratified

• cluster

• convenience

the researcher selects subjects that are convenient or easy to get

• random

• systematic

• stratified

• cluster

• convenience

Which type of sample is this?

Grouping students by advisory, selecting 8 advisories and survey EVEVERYONE in those 8 advisories

• random

• systematic

• stratified

• cluster

• convenience

Which type of sample is this?

Dividing a large M&M bag into 100 smaller bags, selecting 10 bags, and gathering data from everything in those 10 bags.

• random

• systematic

• stratified

• cluster

• convenience

Which type of sample is this?

Surveying 25 students that are in my math class about math

• random

• systematic

• stratified

• cluster

• convenience

Which type of sample is this?

random number generator

• random

• systematic

• stratified

• cluster

• convenience

Which type of sample is this?

randomly pulling names or numbers from a bag.

• random

• systematic

• stratified

• cluster

• convenience