Randomization

randomly assigning subjects to different treatment groups

• simulation

• survey

• randomization

• replication

method that gives every possible sample of the same size an equal chance of occurring

• simple random sample

• stratified sample

• convenience sample

• systematic sample

uses chance to assign units to treatment groups

• comparison

• random assignment

• control

• replication

What does Randomization do for us in an experiment?

• Distributes lurking variables

• helps prevent confounding

• removes bias in assigning treatments

• provides replication

A sample in which each individual or object in the entire population has an equal chance of being selected.

• biased sample

• population

• random sample

• sample

Which sampling method ensures that every member of the population has an equal chance of being selected?

• Random sampling

• Stratified sampling

• Convenience sampling

• Systematic sampling

Sample in which each individual or object in the entire population has an equal chance of being selected.

• Simple Event

• Sample

• Random Sample

• Scatter Plot

Which of the following is not a way to choose a random sample of 25?

• Assign numbers. Use a random number generator to choose 25

• Put names in a hat, mix them up and choose 25

• Assemble possible participants in a circle around a person who is blindfolded,  spin the person around 3 times and have them point at a person.  Do this 25 times.