Types of Bias
Sampling Techniques
Experiment Basics
Designing Experiments
Putting It All Together
100
This type of bias is present if the method used is to blame for the resulting bias.
What is sampling bias?
100
In this most basic sampling technique, all possible samples of a fixed size have the same chance on being selected.
What is a Simple Random Sample (SRS)?
100
The part of an experiment that the researcher actively changes about the subjects.
What is the treatment?
100
In an experiment, this is the process of grouping like experimental units.
What is blocking?
100
A sample is said to be this if it (on average) over-estimates or under-estimates the parameter of interest.
What is biased?
200
This response bias occurs when sampling units are unreachable or fail to answer a survey.
What is nonresponse bias?
200
Also referred to as a "counting-off" strategy of sampling.
What is a Systematic Sample?
200
The specific outcome measured at the end of an experiment.
What is response variable?
200
This type of experimental design uses random digits to equally divide experimental units into treatment groups.
What is the Completely Randomized Design?
200
This can only be proven by a well-designed, well-controlled experiment.
What is cause and effect?
300
"Would you go against the Second Amendment and support the harsher regulation of firearms?" is an example of this type of bias.
What is questionnaire bias?
300
An example of this technique would be to randomly select a few Freshmen, Sophomores, Juniors, and Seniors while studying the satisfaction TCHS students have with their guidance counselors.
What is a Stratified Random Sample?
300
Not a true experiment because there are no applied treatments, this can still be used to collect data on characteristics of interest in a sample.
What is an observational study?
300
In order to study granola's effect on metabolism, units are first divided into groups based on sex then each group is randomly divided into each treatment group is an example of this type of experiment.
What is a Randomized Block Design?
300
If you are recruited to participate in a taste test experiment, you would be acting as this.
What is an experimental unit?
400
This type of sampling bias occurs when people are asked to call-in and give an opinion.
What is voluntary response bias?
400
While studying the proportions of colors of plain M&M's, you randomly select a few packages from the store, than select ten of the M&M's inside each of the selected packages is an example of this sampling technique.
What is a Two-Stage Cluster Sample?
400
An experiment is run in which the treatment group is given a specific diet and exercise routine, and the control is asked to eat and exercise normally. The diet and the exercise are said to be these.
What are confounding variables?
400
An experiment done on sets of twins in which one twin is randomly selected to receive chewing gum during a test and the other is not is an example of this type of experiment.
What is Matched Pairs Design?
400
Along with saving time, saving money, and collecting better information, this is a reason to choose a sample over a census.
What is the possibility of destroying tested units?
500
Size, convenience, and judgement are all types of this.
What is sample selection bias (sampling bias)?
500
In your results, this will be greatly reduced if you stratify the population properly.
What is variability?
500
The three (3) key elements of an experiment.
What are control, randomization, and replication?
500
A type of experiment in which each unit is given ALL treatments in a random order.
What is Repeated Measures Design?
500
In an experiment on young group dynamics, a teacher divides a class into eight groups, four groups of boys and four groups of girls. The groups of boys are then given three, two, one, or no pieces of candy, as are the groups of girls. In the experiment, the gender and the amount of candy are these.
What are the factors?
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