Explanatory variable
Studying a way of life by living that life is known as participant observation.
She was studying chimps.
An anthropologist lives among the group of people that he/she is studying and observes the people.
The hypothesis states what question you are studying. If there is no hypothesis, one wouldn't know what one is studying, so it's impossible to construct a controlled experiment.
When studying the effect (efficacy) of a medication, researchers will give some subjects doses of the medication under study and others an inactive or inert doses to see the relative effect of the medication. This known as a 'blind study' because the participants do not know know whether they received the medication or the inert dose. A 'double blind study' is when a third party designs the experiment and prepares the doses so that neither the subject or the scientist doing the testing knows which is getting the live dose.
An experiment
The practice of studying a way of life by living it is known as participant observation. Researchers immerse themselves in the culture or group they are studying, enabling them to gain firsthand insights and experiences. This approach allows for a deeper understanding of the social dynamics and practices within a particular community.
J.J. Thomson discovered the electron studying the deflection of cathode rays.
A controlled experiment can be used to show a cause and effect relationship. ex: an experiment studying the effect of a certain medicine on patients.
a pressure gauge and a thermometer.
The size of the parachute
mendel worked in a monastery that was already studying garden peas. because they were readily available to him he experimented with them