What is a reason if everyone in a class does the same experiment with the exact material and get different results?

Lesson Summary The two main reasons that your results might not match up each time are uncontrolled conditions and experimental error.

What happens when research results are inconsistent with a theory?

If the results are not consistent, then the theory should be modified and new hypotheses will be generated. Other key components in following the scientific method include verifiability, predictability, falsifiability, and fairness.

Why there are differences between theoretical and experimental results?

Why is there a difference in theoretical and experimental probability? The relationship between the two is that you’ll find if you do the experiment enough times, the experimental probability will get closer and closer to the theoretical probability’s answer.

Why is it important to compare the results from your experiment to the results from other studies?

Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.

How many factors does a scientist want to differ between the experimental and control groups?

Ideally, only one variable is different between the control group and the experimental group in a scientific experiment. Otherwise, the researchers will not be able to determine which variable caused any differences seen in the results.

What do you do if your results do not match your hypothesis for an experiment?

Formulating a New Hypothesis If the initial hypothesis is not supported, you can go back to the drawing board and hypothesize a new answer to the question and a new way to test it. If your hypothesis is supported, you might think of ways to refine your hypothesis and test those.

Can theoretical and experimental probability be the same?

The theoretical probability of an event will always be the same, but the experimental probability is affected by chance, so it can be different for different experiments.

Why various researchers might obtain different results when studying the same problem?

Sample size, Study settings, methodological approaches, and population characteristics could be major factors responsible for differences in results from same study conducted by different researchers.

Why do scientists compare results?

Comparative studies are a critical part of the spectrum of research methods currently used in science. They allow scientists to apply a treatment-control design in settings that preclude experimentation, and they can provide invaluable information about the relationships between variables.

How do experimental and control groups differ?

An experimental group is a test sample or the group that receives an experimental procedure. This group is exposed to changes in the independent variable being tested. A control group is a group separated from the rest of the experiment such that the independent variable being tested cannot influence the results.

What do you call factors that you keep the same for different experimental groups in an experiment?

In a controlled experiment all variables are kept the same, except for the one being tested, which is called the experimental variable , or independent variable . This group is the experimental group . The group that is not affected by the experimental variable is the control group .

What are the two types of errors in an experiment?

In both cases, the experimenter must struggle with the equipment to get the most precise and accurate measurement possible. As mentioned above, there are two types of errors associated with an experimental result: the “precision” and the “accuracy”. One well-known text explains the difference this way:

What is the precision of the result of the experiment?

The answer to this depends on the skill of the experimenter in identifying and eliminating all systematic errors. These are discussed in Section 3.4. The second question regards the “precision” of the experiment. In this case the precision of the result is given: the experimenter claims the precision of the result is within 0.03 m/s.

Why do scientists do experiments differently?

The idea is simple: If researchers follow the same procedures, the likelihood that they will be able to reproduce one another’s work increases. In current practice, however, most scientists do experiments in slightly different ways. Publishing practices also muddle communication.

Why do scientists follow the same procedures?

In particular, researchers need to talk about creating standard ways to perform procedures. The idea is simple: If researchers follow the same procedures, the likelihood that they will be able to reproduce one another’s work increases. In current practice, however, most scientists do experiments in slightly different ways.