4.1.1
A group that you know have similar characteristics before the sample is taken
What is a Strata?
When some members of the population don't have a chance of being selected to be sampled
Can show cause and effect
What is Experiment?
Groups of experimental units are known to be similar before experiment begins
What is Block?
Proportion of data is what to be be statistically significant?
What is Less than or to 5 percent?
The entire group questioned or taken data from
What is Population?
When an individual is selected to the sample but chooses not to participate or cannot be reached
What is Non-response?
When a fake treatment works
What is the Placebo Effect?
Separating experimental units to into blocks, then using random assignment for treatments
What is Block Design?
Institutional Review, Informed Consent, and Confidentiality are all example of what
What is Data Ethics?
Randomly choosing a starting point, then sample with an equal interval between individuals
What is a Systematic Sample?
When you get a pattern of inaccurate results
What is Response Bias?
Why does an experiment need a control group to be successful?
What is to provide a baseline for the treatment data
Using block of size 2 that are very similar before experiment begins
What is Matched Pairs Design?
Drawing conclusions about a population
Which two samples are ineffective and unreliable?
What are Convenience and Voluntary Response?
Lying, intimidation, and confusing/leading questions are all examples of what?
What is Response Bias?
The reason you can't draw conclusions from an observational study
What is there is no treatment imposed?
In this, each experimental unit has an equal chance of being placed in all the treatments
What is a Completely Randomized Design?
You want (larger/smaller) samples with results of (larger/smaller) variability
Larger, Smaller
What are Unbiased and Low Variability?
Bias affects the true proportion of results in an experiment by one of these two ways
What is Overestimation and Underestimation?
The four principles of a good experiment
What are Comparison, Random Assignment, Control, and Replication?
How many treatments would their be with three variables, each with two separate treatments?
What is 8?
When interrupting Mrs. Dubnicka, her students are participating in a large what
What is Margin of Error?