Common Stats
Research design
Validity
Survey
Sampling
100
Another word for arithmetic average.
What is mean?
100
The variable that is manipulated or controlled for.
What is the independent variable?
100
The threat to validity that involves biological or psychological changes in the participants over the course of the study.
What is maturation?
100
Questions on a survey that have only "yes" or "no" options.
What are closed-ended questions/formats?
100
Samples where every member of a population has a representative probability of being included.
What are random samples?
200
The midpoint in a distribution of numbers/data points.
What is median?
200
In a study of the effectiveness of a new teaching technique, the group of students who does not receive the new teaching technique.
What is the control group?
200
When the effectiveness of treatment is dependent on the person administering the treatment.
What is experimenter effect?
200
The portion of a survey/questionnaire that asks general background information about the participants.
What are demographics?
200
The difference between the sample and the population.
What is sampling error?
300
The most frequently occurring number in a data set.
What is mode?
300
In an experiment to study the effectiveness of a new drug, the group who receives the drug.
What is the treatment/experimental group?
300
The observation that changes in the dependent variable are due to the effect of the independent variable and not to some other unintended variables.
What is internal validity?
300
When researchers try their questionnaire with a small sample similar to the intended group of respondents.
What is pilot testing?
300
Type of sampling where the researcher will take every nth name on the population list.
What is systematic sampling?
400
The measure of variability that indicates the total extension of the data.
What is range?
400
This type of design involves measurement of the dependent variable at periodic intervals.
What is time series design?
400
The threat to validity that occurs when the researcher uses extreme groups as participants.
What is statistical regression?
400
A cover letter used for mail surveys or as an introduction to a phone, web-based, email, or personal interview.
What is a letter of transmittal?
400
The type of sampling when there are subgroups of different sizes that a researcher wants to investigate.
What is stratified sampling?
500
The measure of variability that is the sum of deviations from the mean squared.
What is standard deviation?
500
When the researcher administers a treatment and then a posttest to determine the effect of the treatment and there is no control group and no pretest.
What is a one-shot case study?
500
The threat to validity to occurs when participants drop out over the course of a study.
What is experimental mortality?
500
A commonly used technique researchers use to select samples for telephone surveys.
What is Random Digit Dialing (RDD)?
500
Type of sampling that involves a combination of sampling strategies.
What is multistage sampling?
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