used when "natural" but relatively heterogeneous groupings are evident in a statistical population.
What is cluster sample
100
the researcher does not influence the responses
What is an observational study
100
occurs when an experimenter cannot tell the difference between the effects of different factors of a variable
What is a confounding variable
100
occurs when a subject reacts favorably to a placebo when in fact the subject was given a fake treatment.
What is placebo effect
100
is the collection of all outcomes, responses measurements, or counts that are of interest.
What is population
200
a sample that is drawn from a number of separate strata of the population, rather than at random from the whole population, in order that it should be representative.
What is stratified sample
200
the researcher deliberately applies a treatment before observing the responses
What is an experiment
200
the process of randomly assigning subjects to different treatment groups
What is randomization
200
subjects are assigned to different treatment groups through random selection.
What is a completely random design
200
is a subset, or part, of a population.
What is sample
300
consist of only members who are easy to get to.
What is convenience sample
300
applied to a part of the population, influencing how it changes, and responses are observed
What is treatment
300
is the repetition of an experiment under the same or similar conditions.
What is a replication
300
subject are paired up according to similarity.
What is matched pairs design
300
is a numerical description of a population characteristic.
What is parameter
400
a sample when each member of a population is assigned a number.
What is systematic sample
400
population where no treatment is applied
What is a control group
400
Groups of subjects with similar characteristics.
What is blocks
400
neither the experimenter nor the subjects know if the subjects are receiving a placebo or a treatment.
What is a double blind experiment
400
is the branch of statistics that, involves the organization, summarization, and display of data.
What is descriptive statistics
500
count or measure of part of a population and is more commonly used in statistical studies.
What is sampling
500
harmless, fake treatment, that is made to look like the real treatment
What is a placebo
500
subjects do not know if they are receiving a treatment or a placebo.
What is a blinding
500
number of subjects in a study.
What is sample size
500
involves using a sample to draw conclusions about a population.