Sampling Technique

Mrs. Trahan samples her class by selecting every third person on her class list.  Which type of sampling method is this?

• Simple

• Systematic

• Stratified

• Cluster

Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is ______________ random sampling.

• Systematic

• Simple

• Stratified

• Cluster

Farmer Joe randomly picks 100 trees using a random number generator to estimate the number of apples produced by his apple trees.  This is ______________ sampling.

• Simple

• Stratified

• Cluster

• Systematic

Farmer Joe separates his farm into 10 regions.  He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm.  This is _____________ sampling.  

• Cluster

• Systematic

• Stratified

• Simple

Sampling Technique: A toy manufacturer selects every 4^th toy to inspect on a production line to test for defects.

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique. A lobbyist for a major airspace firm assigns a number to each legislator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the legislators corresponding to these numbers.

• random

• stratified

• systematic

• convenience

• cluster

Sampling Technique: A poll on effective educational methods is taken by selecting 4 of the 10 departments at a local university and surveying all members in those groups.

• Systematic

• Stratified

• Cluster

• Convenience

Match the following:

• Stratified Random Sample

• A sample in

  which every group of a given size has an equal

  chance of being chosen.

• Simple Random Sample (SRS)

• The

  division of a population into separate groups based on shared attributes or

  characteristics (homogeneous grouping).

  A simple random sample is

  selected within each group, and the selected units are combined

  to form the sample.

• Judgement Sample

• A method in which sample members from a population are selected according to a random starting point and a fixed, periodic interval.

• Cluster Random Sample

• Involves the division of a

  population into smaller groups.

  Ideally, there is heterogeneity within each

  group. Data are collected

  from all observations in the selected group.

• Systematic Random Sample

• A non-probability sampling technique where the researcher selects units to be sampled based on their own existing knowledge.

Which sampling technique allows Lyra to group students based on race and randomly select students to create a representative sample of the school?

• Simple random sampling

• Stratified random sampling

• Cluster sampling

• Systematic sampling

Mrs. Trahan samples her class by selecting all students sitting at group 1 and group 5 in her classroom.  This sampling technique is called?

• Simple

• Stratified

• Systematic

• Cluster