Vocabulary
The combination of specific levels from all factors that an experimental unit receives
What are treatments?
Used to identify important variables related to the outcome of interest In observational studies, researchers do not assign choices; the just observe them. No experimentation
What is an observational study?
All participants in a study are not told their treatment.
What is single blinding?
A sample obtained by allowing subjects to decide whether or not to respond
What is a Voluntary Response Sample?
The Statue of Liberty's torch is in this hand
What is right?
Human participants in a study.
What is a subject?
Deliberately imposes some treatment on individuals to measure their response.
What is an Experiment?
a "fake" treatment that looks just like the treatmnets being tested.
What is a placebo?
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)?
Does a merry-go-round turn clockwise or counterclockwise?
What is counterclockwise?
group where nothing changes. The normal exposure or no exposure to the independent variable is given to the samples in this group. This is the baseline measurement
What is a control group?
A group of researchers examined 469 individuals diagnosed with brain cancer and compared them to similar individuals of the same age, gender, and race who did not have the disease. They gathered information about each person’s cell phone use and found no clear link between using handheld cell phones and the likelihood of developing brain cancer.
Observational Study
When researchers and subjects are unaware of the treatments that subjects are receiving.
What is double-blinding?
An example of this technique would be to randomly select a few Freshmen, Sophomores, Juniors, and Seniors while studying the satisfaction EBJSHS students have with their guidance counselors.
What is stratified?
What company was initially known as "Blue Ribbon Sports
What is the Nike?
Show a correlation between an explanatory variable and a response variable
What are observational studies?
In gym class, the effect of exercise on blood pressure is studied by requiring that half of the students walk a mile each day while the other students run a mile each day,
Experiment
an experiment where the participants do not know if they have received the treatment or the placebo
What is a single-blind experiment?
While studying the proportions of colors of plain M&M's, you randomly select a few packages from the store. This is an example of this sampling technique.
What is a Cluster Sample?
Aureolin is a shade of this color
What is yellow?
this occurs when an observer or experimenter does not make an attempt to eliminate or otherwise account for other explanations for an observed result in an observational study or experiment
What is a confounding?
Researchers collected information on 1,364 children, beginning in infancy and continuing through their sixth year in school. When the children reached elementary age, the researchers reported a pattern: children who had spent more time in child care before age 4½ were often described by adults as more assertive, disobedient, and aggressive.
Observational Study
a change in a participant's illness or behavior that results from a belief that the treatment will have an effect, rather than the actual treatment
What is the placebo effect?
In your results, this will be greatly reduced if you stratify the population properly.
What is variability?
Jerry the car dealer always prices his used cars based on the model year. Following his pattern, what price should we expect for a car from 1951?
What is $2,015?