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Why do scientists try to control most variables in an experiment or observational study?
To make "the most correctable solution"
What are the difference between an experiment and an observation?
In an experiment investigators apply treatments to experimental units (people, animals, plots of land, etc.) and then proceed to observe the effect of the treatments on the experimental units. n an observational study investigators observe subjects and measure variables of interest without assigning treatments to the subjects. The treatment that each subject receives is determined beyond the control of the investigator. For example, suppose we want to study the effect of smoking on lung capacity in women. Summary: 1.The main difference between observational study and experiments is in the way the observation is done. 2.In an experiment, the researcher will undertake some experiment and not just make observations. In observational study, the researcher simply makes an observation and arrives at a conclusion. 3.In observational study, no experiment is conducted. In this type of study the researcher relies more on data collected. 4.In an experiment, the researcher observes things through various studies. 5.There is human intervention in experiments whereas there is no human intervention in observational study. 6.Hawthorne studies are a good example for experiments. 7.The study to determine the relation between smoking and lung cancer is a typical example for observational study.
What is observational study?
in vivo
What will a scientist never do in an observational study?
In an observational study, a scientist will never draw attention to himself or herself. They will also not attempt to randomize a study.
Which form are observational and experimental data almost always recorded and analyzed?
Observational and experimental data are almost always recorded and analyzed in numerical form.
What type of experiment is an observational study?
In Vivo
What difference between an observational study and an experiment?
in an experiment, the researcher manipulates a variable
What is the primary difference between an experiment and observational study?
In an experiment, the researcher manipulates a variable.
Why is an experiment better then an observational study?
An experiment allows for the researcher to manipulate variables and establish cause-and-effect relationships more effectively than an observational study. This control helps to minimize confounding variables and biases, making the results more reliable. Additionally, experiments often involve random assignment, which enhances the ability to draw conclusions about the relationships being studied.
Unlike an observational study an experiment can prove?
cause and effect
What can an experiment prove that an observational study cannot?
An experiment can establish causation by manipulating variables and controlling for potential confounding factors, while an observational study can only show correlation. Experiments allow researchers to directly test hypotheses and determine the effects of specific interventions, providing stronger evidence for causal relationships. Additionally, experiments can help establish a cause-and-effect relationship with higher confidence due to their randomized controlled design.
Does an observational study or a designed experiment allow the researcher to claim causation between and explanatory variable and a response variable?
designed experiment
The essence of an experiment as opposed to an observational study is to?
change one or more factors and observe the effects
Why do scientists try to control most variables in an experiment or observational study?
To make "the most correctable solution"
In his experiment nicko tinbergen determined that a female wasp can find its nest by using?
is it: observational learning ? imprinting ? landmarks ?
What is the difference between observational and theoretical classification?
Observational classification is based on what you see and observe about the thing (maybe during an experiment) While theoretical classification is based on what you are being taught or what you have been taught or what you read about the thing.
Which of the following is an important advantage of experiments over observational studies?
The main possible advantage is that in an experiment, it is possible to control some of the variables so that it is easier to measure the effect of key variables. In observational studies, no such control is possible.
