Getting the same result when an experiment is repeated
is called replication. If research results can be replicated, it means they are more likely to be correct. Repeated replication of investigations may turn a hypothesis into a theory.
What is the purpose of replicating an experiment that has been already been performed quizlet?
Explain why we replicate experiments. We replicate experiments so that
we can gain a more representative measure of the group we are studying, to improve our precision, to assess variance, and to look for any new outcomes in the experiment.
What is the purpose of replicating an experiment?
Replicates can be used
to measure variation in the experiment
so that statistical tests can be applied to evaluate differences. Averaging across replicates increases the precision of gene expression measurements and allows smaller changes to be detected.
What is replication in an experiment and why is it important quizlet?
replication means that each treatment is used more than once in an experiment. Important because
it allows us to estimate the inherent variability in the data
. This allows us to judge whether an observed difference could be due to chance variation.
What is the importance of a control group?
The control group consists of elements that present exactly the same characteristics of the experimental group, except for the variable applied to the latter. This group of scientific control
enables the experimental study of one variable at a time
, and it is an essential part of the scientific method.
Why is it important to run more than one trial of an experiment?
When we do experiments it’s a good idea to do multiple trials, that is,
do the same experiment lots of times
. When we do multiple trials of the same experiment, we can make sure that our results are consistent and not altered by random events.
What is the next step after the completion of a critical experiment?
Generally, what is the next step after the completion of a critical experiment?
Review of the hypothesis in the light of the data gathered.
Which of the following is the best description of a control group in an experiment?
Which of the following is the best description of a control for an experiment?
The control group is matched with the experimental group except for the one experimental variable
.
What must be present in a well designed experiment?
A well-designed experiment needs to have
an independent variable and a dependent variable
. The independent variable is what the scientist manipulates in the experiment.
What do we mean when we say an experiment lacks replication?
If a finding can’t be replicated, it suggests that
our current understanding of the study system or our methods of testing are insufficient
. … When a study cannot be replicated, it suggests that our current understanding of the study system or our methods of testing are insufficient.
Which of the following best describes a double blind experimental procedure?
What best describes a double-blind experimental procedure?
Half the subjects get the experimental procedure, half the placebo
; which they receive is not known to subjects or experimenters.
Which best describes an experiment that had good scientific design?
Answer:
Each trial was repeated several times during the experiment
. … Each trial was repeated several times during the experiment best describes an experiment that had a good scientific design because trials in an experiment brings either concordant or consistent results or inconsistent results.
What is a control in an experiment and why is it important?
controls are
essential for the unbiased, objective observation and measurement of the dependent variable in response to the experimental setup
.
What is the primary reason to include a control group in an experiment?
The control group (sometimes called a comparison group) is used in an experiment as
a way to ensure that your experiment actually works
. It’s a way to make sure that the treatment you are giving is causing the experimental results, and not something outside the experiment.
Is a control group always necessary?
Do experiments always need a control group? A true experiment (a.k.a. a controlled experiment)
always includes at least one control group
that doesn’t receive the experimental treatment. … For strong internal validity, it’s usually best to include a control group if possible.
Why do you repeat experiments 3 times?
Repeating an experiment more than once
helps determine if the data was a fluke
, or represents the normal case. It helps guard against jumping to conclusions without enough evidence.
